ISUZU Trouble Codes
Reset codes
1) Switch off the ignition (OFF).
2) Jumper leads # 4 and # 6 of the diagnostic socket.
3) Move the transmission control lever to a position other than "P" or "N".
4) Turn on the ignition and within 3 seconds press alternately the brake-accelerator-brake pedal.
If there is a fault, the indicator flashes at intervals of 0.4 seconds. The first sequence of flashes corresponds to the first number of the two-digit diagnostic code.
After a pause of 1.2 seconds, a second flash sequence is output corresponding to the second code number. The same code is displayed three times in a row with an interval of 3.2 seconds. The next malfunction code (if any) is similarly displayed three times in a row after the previous one. After outputting the last of the codes, the process is repeated from the beginning.
|
Code |
System |
CE |
|
01 |
Norm |
- |
|
eleven |
Speed sensor - functioning, open or short short circuit |
- |
|
13 |
Idling limit switch - operation, open or short short circuit |
+ |
|
fourteen |
Coolant temperature sensor - functioning, open or short short circuit |
+ |
|
15 |
Fuel temperature sensor - operation, open or short circuit in the circuit |
- |
|
21 |
Throttle position sensor - open or short circuit in the circuit |
+ |
|
22 |
Injection timing control valve - functioning, open or short circuit in the circuit |
+ |
|
23 |
Intake air temperature sensor - functioning, open or short short circuit |
- |
|
24 |
Absolute pressure sensor in the intake manifold - functioning, open or short circuit in the circuit |
+ |
|
25 |
Correction resistor - open or short circuit in the circuit |
- |
|
26 |
Atmospheric pressure sensor - functioning, open or short short circuit |
- |
|
27 |
Fuel control valve (FCV) - short to ground |
+ |
|
31 |
Regulator - operation, open or short circuit in the circuit |
+ |
|
32 |
Automatic injection timing piston position sensor - operation, open or short circuit in the circuit |
+ |
|
33 |
Idle speed limit switch |
+ |
|
34 |
Metering clutch position sensor - operation, open or short circuit in the circuit |
+ |
|
41 |
Crankshaft speed sensor - operation, open or short circuit in the circuit |
+ |
|
42 |
Back-up crankshaft speed sensor |
- |
|
44 |
Electronic control unit - memory error |
+ |
|
54 |
Piston limit switch of the automatic injection timing device (start position) - open circuit |
+ |
Isuzu OBDI errors. Self-diagnosis.
Trucks
14 - Malfunction in the camshaft position sensor circuit / Wrong signal or malfunction in the camshaft position sensor circuit
15 - Malfunction in the crankshaft position sensor circuit / Wrong signal or malfunction in the crankshaft position sensor circuit
16 - Inconsistency of readings of the crankshaft and camshaft position sensors
22 - Low signal level in the intake air temperature sensor circuit / High signal level in the intake air temperature sensor circuit
23 - Incorrect signal or malfunction in the coolant temperature sensor circuit / Low signal in the coolant temperature sensor circuit / High signal in the coolant temperature sensor circuit
25 - Malfunction of the speed sensor
25 - Low level at the input of the speed sensor / High level of the signal at the input of the vehicle speed sensor
28 - Malfunction in the power take-off sensor circuit
31 - Malfunction in the idling speed regulator circuit
32 - Low signal level at the input of the absolute pressure sensor located in the intake manifold / High signal level at the input of the absolute pressure sensor located in the intake manifold
33 - Malfunction in the boost pressure control solenoid valve circuit
34 - Positive voltage of control circuits of injectors of group No. 1 / Positive voltage of control circuits of injectors of group No. 2
35 - High voltage in the on-board network
36 - Malfunction in the circuit of the internal analog-to-digital converter of the control unit
38 - Low signal in the exhaust flap control solenoid valve circuit / High signal in the exhaust flap control solenoid valve circuit
42 - Excess boost pressure
43 - Low signal in the throttle position sensor circuit / High signal in the throttle position sensor circuit
44 - Malfunction in the EGR valve position sensor circuit
45 - Incorrect signal or malfunction in the EGR control circuit / Incorrect position of the EGR valve (closed position error) / Incorrect position of the EGR valve (stored position error)
46 - Low signal in the exhaust flap control circuit / High signal in the exhaust pressure control valve circuit
47 - Low signal level in the differential pressure gauge circuit / High signal level in the differential pressure gauge circuit / Incorrect initialization of the differential pressure gauge
48 - Low signal in the exhaust gas temperature sensor No. 1 circuit / High signal in the exhaust gas temperature sensor No. 1 circuit
49 - Low signal in the exhaust gas temperature sensor No. 2 circuit / High signal in the exhaust gas temperature sensor No. 2 circuit
51 - Malfunction of the ECM processor
53 - Checksum error of the internal RAM of the control unit
54 - Malfunction of the ROM of the control unit
55 - Malfunction in the reference voltage circuit of the sensor No. 1
56 - Malfunction in the reference voltage circuit of the sensor No. 2
57 - Malfunction in the reference voltage circuit of the sensor No. 3
61 - Incorrect signal or malfunction in the throttle actuator control circuit
65 - Insufficient boost pressure
66 - Malfunction in a chain of glow plugs
67 - Malfunction in the control lamp circuit of the preheating system
71 - Invalid signal or malfunction in the atmospheric pressure sensor circuit / Low signal in the atmospheric pressure sensor circuit / High signal in the atmospheric pressure sensor circuit
75 - Diesel particulate filter control lamp control circuit
76 - Service indicator control circuit
77 - Malfunction in the control circuit of the control lamp "Check the engine"
84 - Disconnection of the data exchange bus of the control unit
85 - Open connection with the transmission control unit (TCM)
87 - Open connection to the variable geometry turbocharger control unit (VNT)
91 - Low signal level at the input of the mass air flow sensor / High signal level at the input of the mass air flow sensor
92 - Incorrect signal or malfunction in the mass air flow sensor circuit
93 - Insufficient amount of recirculated gases
118 - High pressure in the fuel rail / fuel supply system (first stage) / High pressure in the fuel rail / fuel supply system (second stage)
121 - Low signal level at the input of the accelerator pedal position sensor No. 1 / High signal level at the input of the accelerator pedal position sensor No. 1
122 - Low signal level at the input of the accelerator pedal position sensor No. 2 / High signal level at the input of the accelerator pedal position sensor No. 2
124 - Inconsistency of readings of accelerator pedal position sensors No. 1 and No. 2
131 - Clogged particulate filter
132 - Excessive particulate matter in the particulate filter
139 - Exceeding the duration of the regeneration of the differential pressure gauge
141 - Incorrect signal or malfunction in the differential pressure gauge circuit
142 - Malfunction in the differential pressure gauge circuit
143 - Incorrect signal or malfunction in the sensor circuit No. 1 exhaust gas temperature
145 - Incorrect signal or malfunction in the sensor circuit No. 2 exhaust gas temperature
149 - Insufficient degree of regeneration of the particulate filter
151 - Malfunction of the fuel pressure regulator
153 - Error of the internal RAM of the control unit
154 - Control unit programming error
155 - Incorrect voltage in the on-board network
158 - Voltage supply circuit to the injectors of group No. 1
159 - Voltage supply circuit to the injectors of group No. 2
176 - Immobilizer is not programmed
177 - Broken connection with the immobilizer control unit
179 - Incorrect immobilizer response signal
211 - Low signal in the fuel temperature sensor circuit / High signal in the fuel temperature sensor circuit
225 - Low pressure in the fuel rail / fuel supply system
227 - Leakage in the fuel supply system / Insufficient fuel pressure
245 - Low signal in the fuel pressure sensor circuit / High signal in the fuel pressure sensor circuit
247 - Low signal in the fuel pressure regulator circuit / High signal in the fuel pressure regulator circuit
271 - Open circuit in the injector circuit of the first cylinder
272 - Open circuit in the injector circuit of the second cylinder
273 - Open circuit in the third cylinder injector circuit
274 - Open circuit in the fourth cylinder injector circuit
416 - Open in the ECM power supply relay control circuit / High signal in the ECM power supply relay control circuit
542 - Excessive coolant temperature
543 - Excessive engine speed
OBDII
|
FAULT CODES N-SERIES (EURO-4) |
||
|
Fault codes engine management systems 4HK1, 4JJ1 |
||
|
|
|
|
|
DTC |
Flashing codes |
DTC description |
|
P0016 |
16 |
Inconsistency between the readings of the crankshaft and camshaft position sensors |
|
P0045 |
33 |
Malfunction in the boost pressure control solenoid valve circuit |
|
P0079 |
38 |
Low signal level in the solenoid valve circuit of the exhaust flap control |
|
P0080 |
38 |
High signal level in the solenoid valve circuit of the exhaust flap control |
|
P0087 |
225 |
Low pressure in the fuel rail / fuel supply system |
|
P0088 |
118 |
High pressure in the fuel rail / fuel supply system (first stage) |
|
P0088 |
118 |
High pressure in the fuel rail / fuel supply system (second stage) |
|
P0089 |
151 |
Fuel pressure regulator malfunction |
|
P0091 |
247 |
Low signal level in the fuel pressure regulator circuit |
|
P0092 |
247 |
High signal level in the fuel pressure regulator circuit |
|
P0093 |
227 |
Leakage in the fuel supply system |
|
P0101 |
92 |
Incorrect signal or malfunction in the mass air flow sensor circuit |
|
P0102 |
91 |
Low signal level at the input of the mass air flow sensor |
|
P0103 |
91 |
High signal level at the input of the mass air flow sensor |
|
P0107 |
32 |
Low signal level at the input of the absolute pressure sensor located in the intake manifold |
|
P0108 |
32 |
High signal level at the input of the absolute pressure sensor located in the intake manifold |
|
P0112 |
22 |
Low signal level in the intake air temperature sensor circuit |
|
P0113 |
22 |
High signal level in the intake air temperature sensor circuit |
|
P0116 |
23 |
Incorrect signal or malfunction in the coolant temperature sensor circuit |
|
P0117 |
23 |
Low signal level in the coolant temperature sensor circuit |
|
P0118 |
23 |
High signal level in the coolant temperature sensor circuit |
|
P0122 |
43 |
Low signal level in the throttle position sensor circuit |
|
P0123 |
43 |
High signal level in the throttle position sensor circuit |
|
P0182 |
211 |
Low signal level in the fuel temperature sensor circuit |
|
P0183 |
211 |
High signal level in the fuel temperature sensor circuit |
|
P0192 |
245 |
Low signal level in the fuel pressure sensor circuit |
|
P0193 |
245 |
High signal level in the fuel pressure sensor circuit |
|
P0201 |
271 |
Open in a chain of a nozzle of the first cylinder |
|
P0202 |
272 |
Open in the chain of the injector of the second cylinder |
|
P0203 |
273 |
Open in a chain of a nozzle of the third cylinder |
|
P0204 |
274 |
Open in the chain of the fourth cylinder injector |
|
P0217 |
542 |
Excessive coolant temperature |
|
P0219 |
543 |
Excessive engine speed |
|
P0234 |
42 |
Excess boost pressure |
|
P0299 |
65 |
Insufficient boost pressure |
|
P0335 |
15 |
Malfunction in a chain of the crankshaft position sensor |
|
P0336 |
15 |
Incorrect signal or malfunction in the crankshaft position sensor circuit |
|
P0340 |
fourteen |
Malfunction in the camshaft position sensor circuit |
|
P0341 |
fourteen |
Incorrect signal or malfunction in the camshaft position sensor circuit |
|
P0380 |
66 |
Malfunction in a chain of glow plugs |
|
P0381 |
67 |
Malfunction in a chain of a control lamp of a preheating system |
|
P0401 |
93 |
Insufficient amount of recirculated gases |
|
P0404 |
45 |
Incorrect signal or malfunction in the EGR control circuit |
|
P0409 |
44 |
Malfunction in the EGR valve position sensor circuit |
|
P0426 |
143 |
Incorrect signal or malfunction in a chain of the sensor No. 1 temperature of the exhaust gases |
|
P0427 |
48 |
Low signal level in the sensor circuit No. 1 exhaust gas temperature |
|
P0428 |
48 |
High signal level in the sensor circuit No. 1 exhaust gas temperature |
|
P042B |
145 |
Incorrect signal or malfunction in a chain of the sensor No. 2 temperature of the exhaust gases |
|
P042C |
49 |
Low signal level in the sensor circuit No. 2 exhaust gas temperature |
|
P042D |
49 |
High signal level in the sensor circuit No. 2 exhaust gas temperature |
|
P0477 |
46 |
Low signal level in the exhaust flap control circuit |
|
P0478 |
46 |
High signal level in the exhaust pressure control valve circuit |
|
P0500 |
25 |
Faulty speed sensor |
|
P0502 |
25 |
Low level at the input of the speed sensor |
|
P0503 |
25 |
High signal level at the input of the vehicle speed sensor |
|
P0560 |
155 |
Incorrect voltage in the on-board network |
|
P0563 |
35 |
High voltage in the on-board network |
|
P0601 |
53 |
Checksum error of the internal RAM of the control unit |
|
P0602 |
154 |
Control unit programming error |
|
P0604 |
153 |
Internal RAM error of the control unit |
|
P0606 |
51 |
ECM processor malfunction |
|
P060B |
36 |
Malfunction in the circuit of the internal analog-to-digital converter of the control unit |
|
P0633 |
176 |
Immobilizer not programmed |
|
P0638 |
61 |
Incorrect signal or malfunction in the throttle actuator control circuit |
|
P0641 |
55 |
Malfunction in a circuit of the reference voltage of the sensor No. 1 |
|
P0650 |
77 |
Malfunction in a control circuit of a control lamp "Check the engine" |
|
P0651 |
56 |
Malfunction in a circuit of the reference voltage of the sensor No. 2 |
|
P0685 |
416 |
Open in the ECM power supply relay control circuit |
|
P0687 |
416 |
High signal level in the control circuit of the power supply relay ECM |
|
P0697 |
57 |
Malfunction in a circuit of the reference voltage of the sensor No. 3 |
|
P1093 |
227 |
Insufficient fuel pressure |
|
P1261 |
34 |
Positive voltage of control circuits of injectors of group No. 1 |
|
P1262 |
34 |
Positive voltage of control circuits of injectors of group No. 2 |
|
P1404 |
45 |
Incorrect EGR valve position (closed position error) |
|
P1404 |
45 |
Incorrect position of the EGR valve (error of the memorized position) |
|
P1455 |
132 |
Excessive particulate matter in the particulate filter |
|
P1471 |
149 |
Insufficient regeneration of the particulate filter |
|
P161B |
179 |
Incorrect immobilizer response signal |
|
P1621 |
54 |
Malfunction of the ROM of the control unit |
|
P1664 |
76 |
Service indicator control circuit |
|
P1669 |
75 |
Diesel Particulate Filter Warning Lamp Control Circuit |
|
P2122 |
121 |
Low signal level at the input of the accelerator pedal position sensor No. 1 |
|
P2123 |
121 |
High signal level at the input of the accelerator pedal position sensor No. 1 |
|
P2127 |
122 |
Low signal level at the input of the accelerator pedal position sensor No. 2 |
|
P2128 |
122 |
High signal level at the input of the accelerator pedal position sensor No. 2 |
|
P2138 |
124 |
Inconsistency of readings of accelerator pedal position sensors No. 1 and No. 2 |
|
P2146 |
158 |
Voltage supply circuit to injectors of group No. 1 |
|
P2149 |
159 |
Voltage supply circuit to injectors of group No. 2 |
|
P2227 |
71 |
Invalid signal or malfunction in the atmospheric pressure sensor circuit |
|
P2228 |
71 |
Low signal level in the atmospheric pressure sensor circuit |
|
P2229 |
71 |
High signal level in the atmospheric pressure sensor circuit |
|
P242F |
131 |
Clogged particulate filter |
|
P2452 |
142 |
Malfunction in the differential pressure gauge circuit |
|
P2453 |
141 |
Incorrect signal or malfunction in the differential pressure gauge circuit |
|
P2454 |
47 |
Low signal level in the differential pressure gauge circuit |
|
P2455 |
47 |
High signal level in the differential pressure gauge circuit |
|
P2456 |
47 |
Incorrect initialization of differential pressure gauge |
|
P2458 |
139 |
Exceeding the regeneration time of the differential pressure gauge |
|
P253A |
28 |
Malfunction in a chain of the sensor of the power take-off |
|
P256A |
31 |
Malfunction in the idle speed regulator circuit |
|
U0073 |
84 |
Disconnection of the data bus of the control unit |
|
U0101 |
85 |
Open connection to transmission control module (TCM) |
|
U0110 |
87 |
Open connection to variable geometry turbocharger (VNT) control unit |
|
U0167 |
177 |
Broken connection with the immobilizer control unit |