JAC Truck Fault Codes & Service Manuals

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Fault Diagnosis

1. Fault Information Record

Electronic control unit continually monitors sensors, actuators, relevant circuits, MILs, battery voltage and even its

self and carries out reliability tests to sensor output signals, actuator drive signals and internal signals. Once there are

faults in certain link or certain signal is unreliable, electronic control unit sets fault information record in RAM fault

memory immediately. Fault information record is stored in the form of diagnostic trouble code (DTC) and shown in

the sequence of fault occurrence.

Faults can be divided into “steady fault” and “random fault” (such as faults caused by temporary open circuit of

harness or poor contact of connectors) according to fault occurrence frequency.

2. Fault Condition

If duration of an identified fault exceeds set stabilization time for the first time, ECU identifies it as a steady fault and

stores it as a “steady fault”. If the fault disappears, ECU identifies it as a “random fault” and “nonexistent”. If the fault

is identified once again, it is still a “random fault”. However, “existent” historical faults will not influence normal

application of engine.

3. Fault Type

Short to power supply positive pole

Short or open to ground (In the case of pull-up or pull-down resistor for input stage, ECU will identify open circuit

failure of input port as the fault of input port short to power supply positive pole or short to ground)

Unreliable signal

4. Fault Frequency Counter

For every identified fault, there is an individual frequency counter value (HZ). Frequency counter value (Hz)

determines storage time of corresponding fault information record in the memory after fault disappearance (fault

elimination).

For the first time fault identification, it (Hz) is set to be its initial value as 40. If fault condition does not change, this

value will maintain the same forever.

Once identified fault has disappeared and then the condition has been maintained for certain period of time, the value

(Hz) is reduced by 1 after every successful engine start (engine speed exceeds that of engine start completion). At this

moment, ECU recognizes the fault has disappeared but fault information record still exists.

If the fault (such as fault caused by poor contact) appears and disappears frequently, the value (Hz) is increased by 1

but the value will not exceed set upper limit of 100.

When the value (Hz) becomes zero, all fault information records in the fault memory are cleared completely.

5. Fault Alarm

In the case of electronic control system, when there are faults in some important components such as ECU, coolant

temperature sensor, phase sensor, boost pressure sensor, revolution speed sensor, air flow meter, fuel injector, fan relay

and etc, ECU will give alarms via MIL flashing until faults are eliminated.

6. Fault Reading

Fault information records can be brought out from electronic control unit via fault diagnostic apparatus. However,

some faults can be detected only when vehicle reaches corresponding operation condition.

7. Elimination of Fault Information Record

Fault information records in memory should be cleared after fault elimination. DTC can be cleared with ways as

follows:

 When value of ECU frequency counter (Hz) becomes 0, fault information records in fault memory are all cleared

automatically.

 In the case of “Fault memory zero clearing” command, fault information records can be cleared with the application

of fault diagnostic apparatus.

8. Fault Detection

After obtaining fault information records with means above, only suspicious positions for fault occurrence are known.

However, this does not mean faults have been detected. Therefore, cause for one fault may be damaged electrical

component (like sensor or actuator or ECU, etc), wire in open circuit, wire short to ground or battery positive pole and

even mechanical failure.

Faults are internal with their external expressions as various symptoms. When symptoms are detected, check fault

information record for existence with fault diagnostic apparatus or flash code first of all and then eliminate

corresponding faults. Finally, detect faults according to engine symptoms

S/N DTC Meaning

1 P0030 The linear oxygen sensor heater circuit is open.

2 P0031 The linear oxygen sensor heater circuit is short to ground.

3 P0032 The linear oxygen sensor heater circuit is short to battery.

4 P0045 EGR valve circuit is open.

5 P0046 Overtemperature of EGR valve bridge-H chip

6 P0047 EGR valve circuit is short to ground.

7 P0048 EGR valve circuit is short to power supply.

8 P0068 Short-term drifting error in the process of throttle offset self-adaption

9 P0069 The absolute difference between intercooler downstream air pressure and ambient

pressure is unreliable.

10 P0070 Reliability check function for ambient temperature

11 P0072 Too low ambient temperature

12 P0073 Too high ambient temperature

13 P0087 The minimum rail pressure is below the lower limit.

14 P0088 The maximum rail pressure is above the upper limit.

15 P0097 The signal level of intercooler downstream temperature is too low.

16 P0098 The signal level of intercooler downstream temperature is too high.

17 P00BE The original value of fuel rail pressure is incoherent.

18 P0100 The supply voltage of air flow sensor exceeds the limit.

19 P0101 Timeout error of air flow sensor hardware signal

20 P0102 The sensitivity deviation of air flow sensor is below the lower limit.

21 P0103 The sensitivity deviation of air flow sensor is above the upper limit.

22 P010C The signal level measured by air flow sensor is too low.

23 P010D The signal level measured by air flow sensor is too high.

24 P0112 The voltage is below the lower limit of intake air temperature sensor.

25 P0113 The voltage is above the upper limit of intake air temperature sensor.

26 P0116 Error reported in dynamic reliability test of coolant temperature sensor

27 P0117 Coolant temperature signal level is too low (downstream).

28 P0118 Coolant temperature signal level is too high (downstream).

29 P0119 Error reported in static reliability test of coolant temperature sensor

30 P0122 The signal level of accelerator pedal position sensor 1 is relatively low.

31 P0123 The signal level of accelerator pedal position sensor 1 is relatively high.

32 P0127 The signal level of air temperature sensor is relatively high.

33 P0128 Closed-loop control is actuated due to too low coolant temperature.

34 P0131 Oxygen sensor IAIPUNVG point is short to ground.

35 P0132 Oxygen sensor IAIPUNVG point is short to battery.

36 P0168 The signal level of fuel temperature sensor is relatively high.

37 P0182 The signal level of fuel temperature sensor is below the lower limit.

38 P0183 The signal level of fuel temperature sensor is above the upper limit.

39 P0191 The uncorrected rail pressure value is above the upper limit of drift.

40 P0192 The voltage of fuel rail pressure sensor is below the lower limit.

41 P0193 The voltage of fuel rail pressure sensor is above the upper limit.

42 P0194 The uncorrected rail pressure value is below the lower limit of drift.

43 P0195 Engine oil temperature signal fault on CAN

44 P0196 The oil temperature signal is unreliable.

45 P0197 The oil temperature signal level is too low.

46 P0198 The oil temperature signal level is too high.

47 P0201 The 1st cylinder fuel injector circuit is open.

48 P0202 The 2nd cylinder fuel injector circuit is open.

49 P0203 The 3rd cylinder fuel injector circuit is open.

50 P0204 The 4th cylinder fuel injector circuit is open.

51 P0205 The 5th cylinder fuel injector circuit is open.

52 P0206 The 6th cylinder fuel injector circuit is open.

53 P020A An error is reported when the time for electrifying the 1st cylinder reaches to the

maximum.

54 P020B An error is reported when the time for electrifying the 2nd cylinder reaches to the

maximum.

55 P020C An error is reported when the time for electrifying the 3rd cylinder reaches to the

maximum.

56 P020D An error is reported when the time for electrifying the 4th cylinder reaches to the

maximum.

57 P020E An error is reported when the time for electrifying the 5th cylinder reaches to the

maximum.

58 P020F An error is reported when the time for electrifying the 6th cylinder reaches to the

maximum.

59 P0215 Avoid resonance of double mass flywheel when stopping.

60 P0219 Overspeed protection for engine parts

61 P0222 The signal level of accelerator pedal position sensor 2 is relatively low.

62 P0223 The signal level of accelerator pedal position sensor 2 is relatively high.

63 P022A EGR valve circuit is open.

64 P022B EGR valve circuit is short to ground.

65 P022C EGR valve circuit is short to power supply.

66 P022E The signal level at the output position of EGR cooling bypass valve position sensor

is below the lower limit.

67 P022F The signal level at the output position of EGR cooling bypass valve position sensor

is above the upper limit.

68 P0234 The actual air intake flow is greater than the target set by system.

69 P0237 The original voltage of intercooler downstream air pressure sensor is below the

lower limit.

70 P0238 The original voltage of intercooler downstream air pressure sensor is above the

upper limit.

71 P023D The long-term jitter of EGR valve exceeds the limit.

72 P023E The short-term jitter of EGR valve exceeds the limit.

73 P024A An error is reported when the temperature of EGR cooler bypass valve in

electrifying phase is too high.

74 P024E The signal level measured by EGR cooler bypass valve position sensor is below the

limit.

75 P024F The signal level measured by EGR cooler bypass valve position sensor is above the

limit.

76 P0251 The fuel metering unit circuit is open.

77 P0252 The temperature of fuel metering unit driver module is too high.

78 P0253 The fuel metering unit circuit is short to ground.

79 P0254 The fuel metering unit circuit is short to power supply.

80 P0255 Poor contact between ECU and fuel metering unit

81 P025C The voltage of fuel metering unit is below the lower limit.

82 P025D The voltage of fuel metering unit is above the upper limit.

83 P0263 An error is reported when the electrifying time reaches to the maximum.

84 P0266 An error is reported when the electrifying time reaches to the maximum.

85 P0269 An error is reported when the electrifying time reaches to the maximum.

86 P0272 An error is reported when the electrifying time reaches to the maximum.

87 P0275 An error is reported when the electrifying time reaches to the maximum.

88 P0278 An error is reported when the electrifying time reaches to the maximum.

89 P0299. The positive deviation of pressure controller is above the upper limit.

90 P0335 No signal from crankshaft

91 P0336 Crankshaft speed signal is irrational.

92 P0339 Camshaft speed signal is irrational.

93 P0340 No signal from camshaft

94 P0341 The offset angle of camshaft is too large.

95 P0380 The preheating indicator light output circuit is high.

96 P0382 The preheating indicator light output circuit is low.

97 P0383 EGR valve circuit is short to ground.

98 P0384 EGR valve circuit is short to power supply.

99 P0401 The actual air intake flow is greater than the target set by system.

100 P0402 The actual air intake flow is less than the target set by system.

101 P0403 Overtemperature of EGR valve bridge-H chip

102 P0404 The short-term jitter of EGR valve exceeds the limit.

103 P0405 The original voltage of EGR valve sensor signal is below the lower limit.

104 P0406 The original voltage of EGR valve sensor signal is above the upper limit.

105 P0409 EGR valve circuit is open.

106 P040C The signal level of EGR cooler downstream temperature sensor is relatively low.

107 P040D The signal level of EGR cooler downstream temperature sensor is relatively high.

108 P0426 Upstream temperature fault of oxidation catalytic converter

109 P0427 The signal level of upstream temperature of oxidation catalytic converter is

relatively low.

110 P0428 The signal level of upstream temperature of oxidation catalytic converter is

relatively high.

111 P0480 EGR valve circuit is open.

112 P0481 EGR valve circuit is open.

113 P0483 Overtemperature of EGR valve bridge-H chip

114 P0484 Overtemperature of EGR valve bridge-H chip

115 P0487 CJ945 Power level no-load fault

116 P0488 CJ945 Overheating fault

117 P0489 EGR valve circuit is short to ground.

118 P0490 EGR valve circuit is short to power supply.

119 P0500 Wheel fault

120 P0501 Unreliable vehicle speed

121 P0503 Signal of speed sensor exceeds the upper limit.

122 P0504 Unreliable brake signal

123 P0520 Engine oil pressure signal fault on CAN

124 P0521 The maximum oil pressure signal is unreliable.

125 P0522 The signal level of oil pressure sensor is relatively low.

126 P0523 The signal level of oil pressure sensor is relatively high.

127 P0524 The minimum oil pressure signal is unreliable.

128 P0532 The signal level measured by A/C coolant pressure sensor is too low.

129 P0533 The signal level measured by A/C coolant pressure sensor is too high.

130 P0537 The signal level of A/C evaporator’s temperature is relatively low.

131 P0538 The signal level of A/C evaporator’s temperature is relatively high.

132 P0562 The signal level of battery voltage sensor is too low.

133 P0563 The signal level of battery voltage sensor is too high.

134 P0571 False brake signal

135 P0575 The analog cruise control signal is unreliable.

136 P0576 The analog cruise control signal level is too low.

137 P0577 The analog cruise control signal level is too high.

138 P0578 The analog cruise control button is stuck.

139 P0607 Cy320 Hardware error reported

140 P060A Error reported in monitoring too high voltage

141 P060D The accelerator pedal voltage signal is unreliable.

142 P0611 The injection frequency is limited by system.

143 P061B Error reported in torque comparison

144 P061C The deviation difference between the engine speed signals obtained from the 1st level and the 2nd level is too large.

145 P061D The set value of air system is limited by the torque limit of the function control unit.

146 P061F Error reported in the process of throttle offset self-adaption

147 P0627 The control line of priming fuel pump is open.

148 P0628 The control line of priming fuel pump is short to ground.

149 P0629 The control line of priming fuel pump is short to power supply.

150 P062A Overheating of priming pump

151 P062B The set value of fuel injection amount is limited by the torque limit of the function

control unit.

152 P062F Error reported in EEP read-write

153 P0643 The sensor power supply monitoring fault 1

154 P0645 The compressor circuit is open.

155 P0646 The compressor circuit is short to ground in electrifying phase.

156 P0647 The compressor circuit is short to power supply in electrifying phase.

157 P0650 EGR valve circuit is open.

158 P0653 The sensor power supply monitoring fault 2

159 P0660 The positive deviation of throttle controller exceeds the upper limit for a long time.

160 P0661 The Port 1 of EGR valve bridge-H chip is short to ground.

161 P0662 The Port 1 of EGR valve bridge-H chip is short to power supply.

162 P0663 Short circuit / overload of EGR valve bridge-H

163 P0664 The Port 2 of EGR valve bridge-H chip is short to ground.

164 P0665 The Port 2 of EGR valve bridge-H chip is short to power supply.

165 P0668 The voltage of ECU temperature sensor is below the lower limit.

166 P0669 The voltage of ECU temperature sensor is above the upper limit.

167 P0670 EGR valve circuit is open.

168 P0686 The main relay opens too early.

169 P0687 The main relay opens too late.

170 P0691 EGR valve circuit is short to power supply.

171 P0692 EGR valve circuit is short to ground.

172 P0693 EGR valve circuit is short to power supply.

173 P0694 EGR valve circuit is short to ground.

174 P0699 The sensor power supply monitoring fault 3

175 P0704 Clutch signal error

176 P0737 Then engine speed output signal circuit is open.

177 P0738 Then engine speed output signal circuit is short to ground.

178 P0739 Then engine speed output signal circuit is short to power supply.

179 P0A32 Parking counter error

180 P1000 The long-term jitter of EGR valve exceeds the limit.

181 P1001 The relief valve reaches to the maximum permissible opening position.

182 P1002 The relief valve reaches to the maximum permissible opening time.

183 P1003 The average fuel rail pressure regulated by relief valve is out of the range.

184 P1004 Check the flow equilibrium if the relief valve is opened normally.

185 P1005 The relief valve opens.

186 P1006 The relief valve is forced open to implement the pressure shock.

187 P1007 The torque in MAP for torque and fuel conversion does not increase along the fuel

direction strictly and monotonically.

188 P1008 PhyMod_trq2qBas_MAP contains non-strict and non-monotonic Q curve.

189 P1011 The positive deviation of rail pressure is above the upper limit.

190 P1012 The negative deviation of rail pressure is below the lower limit.

191 P1013 The maximum negative deviation of rail pressure is below the lower limit.

192 P1020 The heating drive circuit of fuel filter is open.

193 P1021 The heating drive circuit of fuel filter is short to power supply.

194 P1022 The heating drive circuit of fuel filter is short to ground.

195 P102A The signal level of ambient pressure sensor is relatively high.

196 P102B The signal level of ambient pressure sensor is relatively low.

197 P102C The signal level of ambient temperature sensor is relatively high.

198 P102D The signal level of ambient temperature sensor is relatively low.

199 P1030 Overtemperature of EGR valve bridge-H chip

200 P1031 Short circuit / overload of EGR valve bridge-H

201 P1032 Overcurrent of EGR valve bridge-H based on temperature

202 P1033 Under-voltage of EGR valve bridge-H

203 P1034 The EGR valve in closed status is stuck.

204 P1035 The EGR valve in open status is stuck.

205 P1036 The long-term jitter of EGR valve exceeds the limit.

206 P1037 An error is reported when the EGR valve is stuck in closing or opening.

207 P1038 The physical value of EGR valve position sensor is too high.

208 P1039 The physical value of EGR valve position sensor is too low.

209 P103A The signal level of intercooler downstream temperature is relatively high.

210 P103B The signal level of intercooler downstream temperature is relatively low.

211 P103C EGR valve offset is unreliable.

212 P103D The positive deviation of regeneration controller is above the limit.

213 P103E The positive deviation of regeneration controller is below the limit.

214 P1040 Overheating of throttle bridge-H

215 P1041 Short circuit / overload of throttle bridge-H

216 P1042 Overtemperature caused by overcurrent of throttle bridge-H

217 P1043 Long-term deviation in the process of throttle self-adaption

218 P1044 Output circuit 2 of throttle bridge-H is short to ground.

219 P1045 Under-voltage of throttle bridge-H

220 P1046 Output circuit 2 of throttle bridge-H is short to power supply.

221 P1047 The physical value of throttle position is below the lower limit.

222 P1048 The throttle circuit is short to ground.

223 P1049 The physical value of throttle position is above the upper limit.

224 P104A The throttle circuit is short to power supply.

225 P1060 OBD General fault 1

226 P1061 OBD General fault 10

227 P1062 OBD General fault 11

228 P1063 OBD General fault 12

229 P1064 OBD General fault 13

230 P1065 OBD General fault 14

231 P1066 OBD General fault 15

232 P1067 OBD General fault 16

233 P1068 OBD General fault 2

234 P1069 OBD General fault 3

235 P106A OBD General fault 4

236 P106B OBD General fault 5

237 P106C OBD General fault 6

238 P106D OBD General fault 7

239 P106E OBD General fault 8

240 P106F OBD General fault 9

241 P1070 Blockage of particulate filter

242 P1100 The regulated idling value of air flow sensor is above the upper limit.

243 P1102 The duty cycle of air temperature sensor on the air flow meter is above the upper

limit.

244 P1103 The duty cycle of air temperature sensor on the air flow meter is below the lower

limit.

245 P1106 The time interval measured by the air temperature sensor on the air flow meter is

above the upper limit.

246 P1107 The time interval measured by the air temperature sensor on the air flow meter is

below the lower limit.

247 P110A System degradation 0

248 P110B Level-1 degradation

249 P110C Level-2 degradation

250 P110D Level-3 degradation

251 P110E Vehicle performance limit function is activated.

252 P1110 The detected signal within physical range is relatively high.

253 P1111 The engine coolant temperature signal level is relatively low.

254 P1120 The correction of air flow sensor load exceeds the maximum deviation limit.

255 P1121 The physical value of air flow meter is above the upper limit.

256 P1122 The physical value of air flow meter is below the lower limit.

257 P1123 The signal level of intake air temperature sensor (integrated inside the air flow

sensor) is relatively low.

258 P1130 The signal level of fuel temperature sensor is relatively low.

259 P1131 The signal of fuel temperature is unreliable.

260 P113A The signal of too high oil temperature is unreliable.

261 P113B The signal level of oil temperature sensor is relatively high.

262 P113C The signal level of oil temperature sensor is relatively low.

263 P1200 Short circuit between the high end and low end of the 1st cylinder fuel injector

264 P1201 Short circuit between the high end and low end of the 2nd cylinder fuel injector

265 P1202 Short circuit between the high end and low end of the 3rd cylinder fuel injector

266 P1203 Short circuit between the high end and low end of the 4th cylinder fuel injector

267 P1204 Short circuit between the high end and low end of the 5th cylinder fuel injector

268 P1205 Short circuit between the high end and low end of the 6th cylinder fuel injector

269 P1207 1st cylinder special error

270 P1208 2nd cylinder special error

271 P1209 3rd cylinder special error

272 P120A 4th cylinder special error

273 P120B 5th cylinder special error

274 P120C 6th cylinder special error

275 P1210 An error is reported when the time for electrifying the 1st cylinder reaches to the

minimum.

276 P1211 An error is reported when the time for electrifying the 2nd cylinder reaches to the

minimum.

277 P1212 An error is reported when the time for electrifying the 3rd cylinder reaches to the

minimum.

278 P1213 An error is reported when the time for electrifying the 4th cylinder reaches to the

minimum.

279 P1214 An error is reported when the time for electrifying the 5th cylinder reaches to the

minimum.

280 P1215 An error is reported when the time for electrifying the 6th cylinder reaches to the

minimum.

281 P1216 Maximum deviation error in the inner control circuit of electronic throttle

282 P1217 Minimum deviation error in the inner control circuit of electronic throttle

283 P1218 Maximum deviation error in the outer control circuit of electronic throttle

284 P1219 Minimum deviation error in the outer control circuit of electronic throttle

285 P121A 1st cylinder IQA error

286 P121B 2nd cylinder IQA error

287 P121C 3rd cylinder IQA error

288 P121D 4th cylinder IQA error

289 P121E 5th cylinder IQA error

290 P121F 6th cylinder IQA error

291 P1220 The signal level of intercooler downstream temperature sensor is relatively high.

292 P1221 The signal level of intercooler downstream temperature sensor is relatively low.

293 P122A The positive deviation of throttle controller exceeds the upper limit for a long time.

294 P122B The negative deviation of throttle controller is below the lower limit for a long time.

295 P1230 Error reported in monitoring the OBDII maximum threshold correction

296 P1231 Error reported in monitoring the OBDII minimum threshold correction

297 P1245 System degradation information

298 P1250 An error is triggered when the ET time of the 1st cylinder reaches the maximum limit (when the ZEL comes into effect).

299 P1251 An error is triggered when the ET time of the 2nd cylinder reaches the maximum

limit (when the ZEL comes into effect).

300 P1252 An error is triggered when the ET time of the 3rd cylinder reaches the maximum limit (when the ZEL comes into effect).

301 P1253 An error is triggered when the ET time of the 4th cylinder reaches the maximum limit (when the ZEL comes into effect).

302 P1254 An error is triggered when the ET time of the 1st cylinder reaches the minimum limit (when the ZEL comes into effect).

303 P1255 An error is triggered when the ET time of the 2nd cylinder reaches the minimum limit (when the ZEL comes into effect).

304 P1256 An error is triggered when the ET time of the 3rd cylinder reaches the minimum limit (when the ZEL comes into effect).

305 P1257 An error is triggered when the ET time of the 4th cylinder reaches the minimum limit (when the ZEL comes into effect).

306 P1400 EGR valve circuit is open.

307 P1401 Overtemperature of EGR valve bridge-H chip

308 P1402 EGR valve circuit is short to power supply.

309 P1403 EGR valve circuit is short to ground.

310 P140A The signal level of the EGR cooler downstream temperature is relatively high.

311 P140B The signal level of the EGR cooler downstream temperature is relatively low.

312 P1410 The positive deviation of throttle controller exceeds the upper limit for a long time.

313 P1411 The negative deviation of throttle controller is below the lower limit for a long time.

314 P1415 The time for transforming from RGN to NRM mode is too long.

315 P1418 The indicator actuator circuit for EGR bypass regulating valve is open.

316 P1419 Overheating of indicator actuator for EGR bypass regulating valve

317 P141A The indicator actuator circuit for EGR bypass regulating valve is short to battery.

318 P141B The indicator actuator circuit for EGR bypass regulating valve is short to ground.

319 P141C The relay actuator circuit for EGR bypass regulating valve is open.

320 P141D Overheating of relay actuator for EGR bypass regulating valve

321 P141E The relay actuator circuit for EGR bypass regulating valve is short to battery.

322 P141F The relay actuator circuit for EGR bypass regulating valve is short to ground.

323 P1420 The maximum exhaust temperature signal of the 1st cylinder is too strong.

324 P1421 The maximum exhaust temperature signal of the 2nd cylinder is too strong.

325 P1422 The maximum exhaust temperature signal of the 3rd cylinder is too strong.

326 P1423 The maximum exhaust temperature signal of the 4th cylinder is too strong.

327 P1424 The maximum exhaust temperature signal of the 5th cylinder is too strong.

328 P1425 The maximum exhaust temperature signal of the 6th cylinder is too strong.

329 P1426 The minimum exhaust temperature signal of the 1st cylinder is too strong.

330 P1427 The minimum exhaust temperature signal of the 2nd cylinder is too strong.

331 P1428 The minimum exhaust temperature signal of the 3rd cylinder is too strong.

332 P1429 The minimum exhaust temperature signal of the 4th cylinder is too strong.

333 P142A The minimum exhaust temperature signal of the 5th cylinder is too strong.

334 P142B The minimum exhaust temperature signal of the 6th cylinder is too strong.

335 P1430 The exhaust temperature T0 in cold start is unreliable.

336 P1431 The exhaust temperature T1 in cold start is unreliable.

337 P1432 The exhaust temperature T2 in cold start is unreliable.

338 P1433 The exhaust temperature T3 in cold start is unreliable.

339 P1434 The exhaust temperature T4 in cold start is unreliable.

340 P1435 The exhaust temperature T5 in cold start is unreliable.

341 P1436 The exhaust temperature signal is unreliable.

342 P1437 Unreliable monitoring of the 1st cylinder exhaust temperature

343 P1438 Unreliable monitoring of the 2nd cylinder exhaust temperature

344 P1439 Unreliable monitoring of the 3rd cylinder exhaust temperature

345 P143A Unreliable monitoring of the 4th cylinder exhaust temperature

346 P143B Unreliable monitoring of the 5th cylinder exhaust temperature

347 P143C Unreliable monitoring of the 6th cylinder exhaust temperature

348 P1440 Negative deviation error of oxygen sensor regulator

349 P1441 Positive deviation error of oxygen sensor regulator

350 P1442 Conversion failure of oxygen sensor regulator

351 P1450 The particulate filter upstream temperature is unreliable.

352 P1451 The signal level of particulate filter upstream temperature is relatively high.

353 P1452 The signal level of particulate filter upstream temperature is relatively low.

354 P1453 The signal level of particulate filter upstream temperature sensor is relatively high.

355 P1454 The signal level of particulate filter upstream temperature sensor is relatively low.

356 P1455 Connection failure of particulate filter differential pressure sensor hose

357 P1456 The particulate filter differential pressure sensor is unreliable.

358 P1457 Maximum characteristic differential pressure of particulate filter

359 P1458 Minimum characteristic differential pressure of particulate filter

360 P1459 Minimum deviation of particulate filter

361 P145A The signal level of particulate filter flow impedance is high.

362 P145B Maximum deviation of particulate filter smoke mass

363 P145C Minimum deviation of particulate filter smoke mass

364 P145D Maximum value of particulate filter smoke mass

365 P145E The signal level of particulate filter flow impedance is relatively high.

366 P145F The signal level of particulate filter flow impedance is relatively low.

367 P1460 The maximum differential pressure signal of particulate filter is enhanced.

368 P1461 The minimum differential pressure signal of particulate filter is enhanced.

369 P1462 The dynamic differential pressure of particulate filter is unreliable.

370 P1463 The differential pressure self-adaption of particulate filter hose is unreliable.

371 P1464 Particulate filter differential pressure error

372 P146A The physical value of differential pressure sensor for particulate oxidation catalyst exceeds the upper limit.

373 P146B The physical value of differential pressure sensor for particulate oxidation catalyst falls below the lower limit.

374 P146C CAN Signal error

375 P146D CAN Signal error

376 P1470 Nernst signal error of oxygen sensor

377 P1471 The oxygen sensor is virtually grounded.

378 P1472 The dynamic signal level of oxygen sensor is relatively low.

379 P1473 Oxygen sensor heater coupling signal fault

380 P1474 The oxygen sensor heater signal is unreliable.

381 P1475 The oxygen sensor battery voltage is relatively low.

382 P1476 The calibration signal level of oxygen sensor is relatively high.

383 P1477 The calibration signal level of oxygen sensor is relatively low.

384 P1478 The oxygen concentration of oxygen sensor exceeds the maximum threshold.

385 P1479 The oxygen concentration of oxygen sensor exceeds the minimum threshold.

386 P147A Relatively high oxygen concentration is unreliable.

387 P147B Relatively high oxygen concentration is unreliable.

388 P147C Relatively high oxygen concentration is unreliable.

389 P147D Relatively low oxygen concentration is unreliable.

390 P147E Relatively low oxygen concentration is unreliable.

391 P147F Relatively low oxygen concentration is unreliable.

392 P1480 The calibration value of oxygen sensor internal impedance is too high.

393 P1481 The calibration value of oxygen sensor internal impedance is too low.

394 P1482 The SPI battery voltage of oxygen sensor is too low.

395 P1483 The SPI signal of oxygen sensor is unreliable.

396 P1484 The oxygen sensor temperature is above the upper limit.

397 P1485 The oxygen sensor temperature is below the lower limit.

398 P1486 The oxygen sensor voltage in shunting exceeds the threshold.

399 P148A The signal level of turbocharger upstream temperature sensor is relatively high.

400 P148B The signal level of turbocharger upstream temperature sensor is relatively low.

401 P1500 The voltage signal level of vehicle speed sensor is relatively high.

402 P1501 The voltage signal level of vehicle speed sensor is relatively low.

403 P150A Power supply diagnosis is disabled in electrifying phase due to overvoltage of

battery.

404 P150B Power supply diagnosis is disabled in electrifying phase due to under-voltage of

battery.

405 P1510 The signal level measured by A/C coolant pressure sensor is too low.

406 P1511 The signal level measured by A/C coolant pressure sensor is too low.

407 P1512 The signal level measured by A/C coolant pressure sensor is too high.

408 P1513 The signal level measured by A/C coolant pressure sensor is too high.

409 P1514 Overtemperature of compressor torque reduction command circuit in electrifying

phase

410 P1515 A/C switch CAN input signal is unreliable.

411 P1516 The compressor torque reduction command circuit in electrifying phase is short to ground.

412 P1517 The compressor torque reduction command circuit in electrifying phase is short to power.

413 P1520 Short circuit of turbocharger bridge-H

414 P1521 Under-voltage of turbocharger bridge-H

415 P1522 Overcurrent of turbocharger bridge-H

416 P1523 Overtemperature of turbocharger bridge-H

417 P1524 Overcurrent of turbocharger bridge-H temperature sensor

418 P1525 The valve is stuck in deviation learning process.

419 P1526 Output circuit 1 of turbocharger bridge-H is short to ground.

420 P1527 Output circuit 1 of turbocharger bridge-H is short to ground.

421 P1528 Output circuit 1 of turbocharger bridge-H is short to battery.

422 P1529 Output circuit 2 of turbocharger bridge-H is short to battery.

423 P1601 EGR valve circuit is open.

424 P1602 Too high downstream temperature of coolant temperature sensor is unreliable.

425 P1603 EGR valve circuit is short to power supply.

426 P1604 EGR valve circuit is short to ground.

427 P1608 EGR valve circuit is short to power supply.

428 P1609 EGR valve circuit is short to ground.

429 P160A EGR valve circuit is open.

430 P160B Overtemperature of EGR valve bridge-H chip

431 P160C Overcurrent of turbocharger bridge-H temperature sensor

432 P1610 Execute closing fuel injection under standard ICO mode.

433 P1613 The electrifying time detected by galloping prevention monitor is too long.

434 P1614 Several faults occur during SPI communication.

435 P1615 Time-out when trying to set up or cancel alarm task

436 P1617 Error reported in monitoring under-voltage

437 P1618 WDA works abnormally.

438 P1619 EGR valve circuit is short to power supply.

439 P161A EGR valve circuit is short to ground.

440 P161B EGR valve circuit is open.

441 P161C EGR valve circuit is open.

442 P161D Failure in software reset visibility

443 P161E Failure in software reset visibility

444 P161F Failure in software reset visibility

445 P1620 TTLAMP drive circuit is open.

446 P1621 The drive circuit for fuel consumption display is short to power supply.

447 P1622 The drive circuit for fuel consumption display is short to ground.

448 P1623 The drive circuit for fuel consumption display is open.

449 P1624 Overtemperature of the drive circuit for fuel consumption display

450 P1625 TTLAMP drive circuit is short to power supply.

451 P1626 TTLAMP drive circuit is short to ground.

452 P1627 Overheating of TTLAMP drive circuit

453 P1633 The signal level of ECU temperature sensor is relatively high.

454 P1634 The signal level of ECU temperature sensor is relatively high.

455 P1635 The signal level of ECU temperature sensor is relatively low.

456 P1636 The signal level of ECU temperature sensor is relatively low.

457 P1637 The power supply voltage is too high.

458 P1638 The power supply voltage is too low.

459 P1639 The physical value of ECU temperature sensor exceeds the upper limit.

460 P163A The physical value of ECU temperature sensor falls below the lower limit.

461 P163B ECU temperature sensor SPI fault (LM71)

462 P1640 Compressor overtemperature in electrifying phase

463 P1643 Signal safety checkout error

464 P1645 The injection frequency is limited by the boosting electric quantity charging balance.

465 P1646 The injection frequency is limited by the high pressure fuel pump fuel quantity

balance.

466 P1647 The injection frequency is limited by the runtime.

467 P164C EGR valve circuit is open.

468 P164D EGR valve circuit is short to power supply.

469 P164E EGR valve circuit is short to ground.

470 P1650 EEP Clear Error

471 P1651 EEP Clear Error

472 P1652 An error is reported when the module’s data-writing is disabled for three times.

473 P165A Null dataset identifier

474 P165B Dataset switchover fault

475 P165C EEPROM data-reading error

476 P1660 ADC open circuit pulse test fault

477 P1662 The voltage being transformed by ADC module exceeds the set range of test voltage.

478 P1663 The radiometry correction exceeds the set range.

479 P1664 Monitoring control communication fault

480 P1665 SPI Monitoring control communication fault

481 P1666 Several faults occur when testing the whole ROM zone.

482 P1667 The number of responsive bytes obtained from CPU in monitoring mode is too small / Error of the set response time of monitoring mode

483 P1668 Error of the set response time of monitoring mode

484 P166A OFF-route test time-out

485 P166B The electrifying time for injection is unreliable.

486 P166C The initial electrifying angle (SO E) is unreliable.

487 P166D ZFC is unreliable.

488 P166E Fuel injection monitoring mode 1

489 P166F Fuel injection monitoring mode 2

490 P1670 Error reported in fuel injection correction

491 P1671 Unreliable rail pressure

492 P1672 The torque limit is set once any error is detected before the MoCSOP's error is

generated.

493 P1673 Monitoring OFF-route forward test fault

494 P1674 Monitoring fault mode 3

495 P1675 The negative deviation of throttle controller is below the lower limit for a long time.

496 P1676 Open circuit of EGR valve bridge-H

497 P1677 Overload of EGR valve bridge-H

498 P1678 Overtemperature of EGR valve bridge-H chip

499 P167B CY33X fault

500 P167C The set value of rail pressure is limited by the torque limit of the function control

unit.

501 P1680 The cruise indicator drive circuit is open.

502 P1681 Overtemperature of cruise indicator drive circuit

503 P1682 The cruise indicator drive circuit is short to power supply or high level.

504 P1683 The cruise indicator drive circuit is short to ground.

505 P1684 The grill heater is always ON.

506 P1685 DFC mechanical fault when turning on ignition switch

507 P1686 Fuel filter heating power level temperature fault

508 P1687 CJ945 Power level no load fault

509 P1688 CJ945 Power level no load fault

510 P1689 Overheating of intake air heater drive circuit

511 P168A CJ945 Overheating fault

512 P168B CJ945 Power level is short to battery.

513 P168C CJ945 Power level is short to battery.

514 P168D CJ945 Power level is short to ground.

515 P168E CJ945 Power level is short to ground.

516 P1700 Unreliable clutch signal / Clutch signal error

517 P1710 Overheating of engine speed sensor

518 P1720 Transmission neutral position signal

519 P2002 The particulate oxidation catalyst device is removed.

520 P2004 Overcurrent of EGR valve bridge-H based on temperature

521 P2008 EGR valve circuit is open.

522 P2009 EGR valve circuit is short to ground.

523 P2010 EGR valve circuit is short to power supply.

524 P2014 Under-voltage of EGR valve bridge-H

525 P2015 The turbocharger control valve is stuck.

526 P2072 The throttle valve is frozen.

527 P2076 An error is reported when the EGR valve is stuck in closing or opening.

528 P2077 The signal level of swirl valve position sensor is relatively low.

529 P2078 The signal level measured by the variable swirl valve position sensor is above the

limit.

530 P207A Overtemperature of EGR valve bridge-H chip

531 P207B The short-term jitter of EGR valve exceeds the limit.

532 P2100 Open circuit of throttle bridge-H

533 P2101 Overcurrent of throttle bridge-H

534 P2102 Output circuit 1 of throttle bridge-H is short to ground.

535 P2103 Output circuit 1 of throttle bridge-H is short to battery.

536 P2135 Signals of accelerator pedal position sensor 1 and 2 are unreliable.

537 P213A Open circuit of EGR valve bridge-H

538 P213B Overload of EGR valve bridge-H

539 P213C The Port 2 of EGR valve bridge-H chip is short to ground.

540 P213D The Port 2 of EGR valve bridge-H chip is short to ground.

541 P2141 The Port 1 of EGR valve bridge-H chip is short to ground.

542 P2142 The Port 1 of EGR valve bridge-H chip is short to power supply.

543 P2146 Short circuit

544 P2149 Short circuit

545 P2157 Unreliable vehicle speed signal

546 P2173 False positive deviation of throttle regulator

547 P2175 False negative deviation of throttle regulator

548 P2226 Fault of signal obtained from CAN by air pressure sensor

549 P2228 The signal value of ambient pressure is below the lower limit.

550 P2229 The signal value of ambient pressure is above the upper limit.

551 P2264 EGR valve circuit is open.

552 P2265 An error is reported when the moisture content in fuel is detected.

553 P2266 EGR valve circuit is short to ground.

554 P2267 EGR valve circuit is short to power supply.

555 P2268 EGR valve circuit is open.

556 P2269 The sensor self-checking signal level is above the upper limit.

557 P2290 The rail pressure is below the minimum set value.

558 P242F The particulate filter smoke load exceeds the maximum.

559 P2454 The signal level of particulate filter differential pressure sensor is relatively low.

560 P2455 The signal level of particulate filter differential pressure sensor is relatively high.

561 P2458 Particulate filter regeneration permanent fault

562 P245A EGR cooler bypass valve fault

563 P245B Too low EGR cooling efficiency

564 P245D The signal level of EGR cooler sensor is relatively high.

565 P250F Danger is caused by too low fuel level and air ingress into hydraulic system.

566 P2519 A/C switch CAN input signal error

567 P2522 The compressor torque reduction command circuit in electrifying phase is open.

568 P2562 The turbocharger bridge-H chip circuit is open.

569 P2563 The turbocharger control valve is stuck.

570 P2564 The original voltage of EGR valve sensor signal is below the lower limit.

571 P2565 The original voltage of EGR valve sensor signal is above the upper limit.

572 P2621 The throttle signal level is relatively low.

573 P2622 The throttle signal level is relatively high.

574 P2626 The oxygen sensor pump current terminal IP is in open circuit.

575 B0020 Airbag collision status

576 U0121 ABS ECU main data loss

577 U0400 CAN received frame BCM1 message length error

578 U0415 CAN received frame ABS1 message length errorv

Over the 50 years of its existence, JACMotors has come a long way from being a modest auto parts manufacturer to one of the five largest Chinese auto companies. Today, JAC Motors manufactures light, medium and heavy trucks, buses, pickups, vans, sedans, electric cars, engineering vehicles, engines, chassis and other key components for automobiles. The manufacturer's annual capacity today is 500,000 units of engines and 700,000 vehicles. The company's path to success has not always been easy, but every adversity is invariably followed by a meteoric rise.

JAC was founded in 1964. At the time of its foundation, it was named Hefei Jiang huai AutomobileFactory. The company was engaged in the production of automotive components. Just four years after its foundation, in 1968, the company produced its first own car. Since then, the company's rapid growth has not stopped for a minute. For 40 years, the development of the company has been associated with the production of commercial vehicles for sale in the domestic market. In May 1990, JAC's first export consignment of 36 light trucks and 24 buses was shipped to Bolivia, opening up overseas markets for the company. The sales volumes of that time may seem ridiculous today - in the early 90s the company sold less than 1000 units of light trucks, but by the end of the decade the situation had changed dramatically. In 1997, an enterprise was founded which was named Anhui Jianghuai Automobile Co., LTD, which we know today as JAC Motors. On the basis of light trucks, JAC began a breakthrough into the segment of heavy trucks, and most importantly, began work on entering the passenger car market.