Isuzu Trouble Codes

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Isuzu Trouble Codes

Isuzu OBD1 codes

12	System Diagnostic - Ready
13	Oxygen sensor or circuit
14	Coolant Temperature Sensor Circuit
14	High Coolant Temperature{5}
14A	High Coolant Temperature{6}
14B	Low Coolant Temperature{6}
15	Coolant Temperature Sensor Circuit
15	Low Coolant Temperature{5}{7}
16	Same as 15
21	TP Sensor And/Or Idle Switch
	MAP Sensor{1}
	TP Sensor, Voltage High{5}{7}
	Throttle valve switch/Wide Open Throttle (WOT) position sensor, 1989 Manifold Absolute Pressure (MAP) circuit failure
	Throttle Position Sensor (TPS) - V6 models
21A	TP Sensor, Voltage High{6}
21B	TP Sensor, Voltage Low{6}
22	Starter signal system/1988 and 1989 fuel cut solenoid circuit failure
	TP Sensor
	TP Sensor, Voltage Low{5}{7}
	No Starter Signal{8}
	Fuel Cut Off Relay{4}
23	MAT Sensor
	MAT Sensor, Low Temp{7}
	M/C Solenoid Circuit{4}
	Mixture control solenoid circuit failure - 1987 and 1995 Amigo/Pick-up, 1989 to 1994 V6 models
	Power transistor circuit - 1988 to 1994 four-cylinder models
	Intake Air Temperature sensor voltage high - turbo, 1989 to 1995 1.6L, 1.8L, 3.2L vehicles
23A	MAT Sensor, Low Temp{6}
23B	MAT Sensor, High Temp{6}
24	Vehicle Speed Sensor (VSS) circuit - V6 models
24	Pressure regulator vacuum switching valve - 1988 to 1994 four-cylinder, also Impulse non-turbo
25	MAT Sensor
	Vacuum Switching Valve{4}{9}
	MAT Sensor, High Temp{7}
	Intake Air Temperature sensor voltage high - turbo, 1989 to 1995 1.6L, 1.8L, 3.2L vehicles
	AIR VSV circuit failure
26	Canister Vacuum Switching Valve{4}
26	VSV System{9}
27	VSV System{9}
	Constant Voltage High From VSV To ECM{4}
	Fuel injector driver transistor
31	No Ignition Reference Pulses To ECM{4}
	Wastegate Control{7}{8}
	No ignition reference to ECM - 1988 and 1989 models
32	Exhaust Gas Recirculation (EGR) system failure
33	MAP Sensor
	MAP Sensor, Voltage High{5}{7}
	Fuel Injector{9}
33A	MAP Sensor, Voltage High–Low{6}
33B	MAP Sensor, Voltage Low–High{6}
34	MAP Sensor{8}{11}
	MAP Sensor, Voltage Low{5}
	EGR Gas Sensor Circuit{4}{7}
	Fuel Injector{10}
35	MAP Sensor Constant Voltage High{4}
35	Power Transistor System{9}
36	MAP Sensor Circuit{4}
41	Crank Angle Sensor{9}
41	Cam Signal{7}
42	Fuel Cut Off Relay{4}
	Electronic Spark Timing{5}
	Ignition Control Circuit{6}{8}
43	Throttle valve switch/Wide Open Throttle (WOT) position sensor {9}
	Electronic spark control failure - V6 models
	Idle contact switch always closed (1988 to 1994 four-cylinder, also Impulse non-turbo)
	1989 Manifold Absolute Pressure (MAP) circuit failure
	Knock sensor (1989 to 1995 1.6L, 3.2L) {8}
44	O2S Lean
44	Fuel Metering{9}
45	Oxygen sensor (rich condition indicated)
45	Fuel Metering{9}
51	PROM{2}{8}
	Fuel Cut Solenoid Circuit And/Or ECM{3} carbureted four-cylinder models
	ECM{6}
	MEM-CAL{7}
	PROM, Cal-Park & ECM{5}
	ROM and/or RAM{9}
52	ECM{4}
	EEPROM{8}
	ROM and/or RAM{9}
	PROM, Cal-Park & ECM{5}
53	Switching Valve And/Or ECM{4}
53	Vacuum Switching Valve{9}
54	M/C (mixture control) Solenoid Circuit And/Or ECM{2}
	Vacuum Control Solenoid And/Or ECM{3}
	Power Transistor System{9}
	Fuel Pump, Voltage Low{5}{8}
	Shorted vacuum control solenoid, Faulty Electronic Control Module (ECM) - 1988 and 1989 models
55	ECM{4}{8}
	PROM, Cal-Park & ECM{5}
	Faulty Electronic Control Module (ECM) or oxygen sensor
61	Air flow sensor circuit failure {9}
62	Air flow sensor circuit failure {9}
63	Vehicle Speed Sensor (VSS) circuit {9}
64	Fuel injector driver transistor {9}
65	Throttle valve switch/Wide Open Throttle (WOT) position sensor, 1989 Manifold Absolute Pressure (MAP) circuit failure
65	Full throttle switch always on
66	Knock sensor circuit failure {9}
71	Throttle position switch signal abnormal {9}
72	VSV for EGR system short or open {9}
73	Same as 72 transister or ground {9}

{1}—1989 I-Mark.	{2}—I-Mark, carbureted.
{3}—Pickup, carbureted.	{4}—Carbureted models.
{5}—Throttle body fuel injection.	{6}—Rodeo & Trooper w/3.2L engine, Stylus & 1990–92 Impulse less turbocharger.
{7}—Stylus & 1990–92 Impulse w/turbocharger.	{8}—I-Mark, multi-port fuel injection.
{9}—Amigo, Pickup, Rodeo & Trooper w/2.6L engine & 1988–91 Impulse.	{10}—Impulse.
{11}—Amigo, Pickup, Rodeo & Trooper.

Isuzu OBD2 codes

OBD2
P0101	MAF System Performance
P0102	MAF Sensor Circuit Frequency Low
P0103	MAF Sensor Circuit Frequency High
P0106	MAP System Range/Performance
P0107	MAP Circuit Input Low
P0108	MAP Circuit Input High
P0112	IAT Circuit Input Low
P0113	IAT Circuit Input High
P0116	ECT Circuit Range/Performance
P0117	ECT Circuit Input Low
P0118	ECT Circuit Input High
P0121	TP Sensor System Performance
P0122	TP Sensor Circuit Input Low
P0123	TP Sensor Circuit Input High
P0125	ECT Insufficient Coolant Temperature For Closed Loop Fuel Control
P0131	HO2S Circuit Voltage Low Bank 1 Sensor 1
P0132	HO2S Circuit Voltage High Bank 1 Sensor 1
P0133	HO2S Slow Response Bank 1 Sensor 1
P0134	H02S Circuit No Activity Bank 1 Sensor 1
P0135	HO2S Heater Circuit Malfunction Bank 1 Sensor 1
P0137	HO2S Circuit Voltage Low Bank 1 Sensor 2
P0138	HO2S Circuit Voltage High Bank 1 Sensor 2
P0139	HO2S Slow Response Bank 1 Sensor 2
P0140	H02S Circuit No Activity Bank 1 Sensor 2
P0141	HO2S Heater Circuit Malfunction Bank 1 Sensor 2
P0143	HO2S Circuit Voltage Low Bank 1 Sensor 3
P0144	HO2S Circuit Voltage High Bank 1 Sensor 3
P0146	HO2S Insufficient Activity Bank 1 Sensor 3
P0147	HO2S Heater Circuit Bank 1 Sensor 3
P0151	HO2S Circuit Voltage Low Bank 2 Sensor 1
P0152	HO2S Circuit Voltage High Bank 2 Sensor 1
P0153	HO2S Circuit Slow Response Bank 2 Sensor 1
P0154	H02S Circuit Insufficient Activity Bank 2 Sensor 1
P0155	HO2S Heater Circuit Bank 2 Sensor 1
P0157	HO2S Circuit Voltage Low Bank 2 Sensor 2
P0158	HO2S Circuit Voltage High Bank 2 Sensor 2
P0160	H02S Circuit Insufficient Activity Bank 2 Sensor 2
P0161	HO2S Heater Circuit Bank 2 Sensor 2
P0171	Fuel Trim System Lean Bank 1
P0172	Fuel Trim System Rich Bank 1
P0174	Fuel Trim System Lean Bank 2
P0175	Fuel Trim System Rich Bank 2
P0201–P0206	Injector Control Circuit Cyls. 1–6
P0218	Transmission Over Temperature Condition
P0300	Engine Misfire Detected
P0301–P0306	Misfire Detected Cyls. 1–6
P0325	KS Filter Module Or Circuit
P0327	KS Sensor Circuit Input Low
P0335	CKP Sensor Circuit Malfunction
P0336	CKP Sensor 58X Reference Signal Circuit Range/Performance
P0337	CKP Sensor Circuit Frequency Low
P0341	CMP Sensor Circuit Range/Performance
P0342	CMP Sensor Circuit Input Low
P0351	Ignition Coil ‘‘A’’ Primary/Secondary Circuit Malfunction (2.2L)
P0351	Ignition Control Circuit (2.6L)
P0351–P0356	Ignition Control Circuits 1–6 (3.2L)
P0352	Ignition Coil ‘‘B’’ Primary/Secondary Circuit Malfunction (2.2L)
P0401	EGR Flow Insufficient
P0402	EGR Excessive Flow Detected
P0404	EGR Sensor Circuit Range/Performance, Stuck Open
P0405	EGR Sensor Circuit Low
P0406	EGR Sensor Circuit High
P0420	TWC System Low Efficiency Bank 1
P0430	TWC System Low Efficiency Bank 2
P0440	EVAP System Malfunction
P0441	EVAP System No Flow During Purge
P0442	EVAP System Small Leak Detected
P0443	EVAP System Purge Control Valve Circuit Malfunction
P0446	EVAP System Canister Vent Blocked (Except 2.2L)
P0446	EVAP System Canister Vent Control Circuit Malfunction (2.2L)
P0449	EVAP System Vent Valve/Solenoid Circuit Malfunction
P0452	EVAP System Pressure Sensor Input Low
P0453	EVAP System Pressure Sensor Input High
P0461	Fuel Level Sensor Circuit Performance
P0462	Fuel Level Sensor Circuit Input Low
P0463	Fuel Level Sensor Circuit Input High
P0480	Cooling Fan 1 Control Circuit
P0481	Cooling Fan 2 Control Circuit
P0501	VSS Circuit Range Performance
P0502	VSS Circuit Input Low
P0505	Idle Control System Malfunction
P0506	IAC System RPM Low
P0507	IAC System RPM High
P0532	A/C Refrigerant Pressure Sensor Circuit Input Low
P0533	A/C Refrigerant Pressure Sensor Circuit Input High
P0560	System Voltage Low
P0562	System Voltage Low
P0563	System Voltage High
P0601	PCM Memory Checksum Error
P0705	Transaxle Range Switch Circuit
P0706	Transaxle Range Switch Performance
P0712	TFT Voltage Low
P0713	Transmission Fluid Temperature Voltage High
P0719	Brake Switch Circuit Low
P0722	Output Speed Sensor Circuit No Signal
P0723	Output Speed Sensor Circuit Intermittent Signal
P0724	Brake Switch Circuit High
P0730	Gear Ratio Improper
P0742	TCC Circuit Stuck On
P0748	Transmission Pressure Control Solenoid Electrical Fault
P0751	Transmission SS ‘‘A’’ Performance Or Stuck Off
P0753	Transmission SS ‘‘A’’ Electrical Fault
P0756	Transmission SS ‘‘B’’ Performance Or Stuck Off
P0758	Transmission SS ‘‘B’’ Electrical Fault
P1106	MAP Circuit Intermittent Voltage High
P1107	MAP Circuit Intermittent Voltage Low
P1108	Barometric Pressure Circuit Input High
P1111	IAT Sensor Circuit Intermittent Voltage High
P1112	IAT Sensor Circuit Intermittent Voltage Low
P1114	ECT Sensor Circuit Intermittent Voltage Low
P1115	ECT Sensor Circuit Intermittent Voltage High
P1121	TP Sensor Circuit Intermittent Voltage High
P1122	TP Sensor Circuit Intermittent Voltage Low
P1133	H02S Insufficient Switching Bank 1 Sensor 1
P1134	H02S Transition Time Ratio Bank 1 Sensor 1
P1153	H02S Insufficient Switching Bank 2 Sensor 1
P1154	H02S Transition Time Ratio Bank 2 Sensor 1
P1171	Fuel System Lean During Acceleration
P1297	Electrical Load Detector Circuit Input Low
P1298	Electrical Load Detector Circuit Input High
P1300	Random Misfire
P1336	CKP System Variation Not Learned
P1359	CKP/TDC Sensor Disconnected
P1361	TDC Sensor Intermittent Interruption
P1362	TDC Sensor No Signal
P1380	ABS Rough Road System Fault
P1381	Cylinder Position Sensor Intermittent Interruption, Misfire Detected (Except 1998 Rodeo)
P1381	ABS Rough Road Class 2 Serial Data Fault Or Link Error (1998 Rodeo)
P1382	Cylinder Position Sensor No Signal
P1390	G Sensor Circuit Intermittent Voltage Low
P1391	G Sensor Performance
P1392	G Sensor Voltage Low
P1393	G Sensor Voltage High
P1394	G Sensor Intermittent Voltage High
P1404	EGR Valve Stuck Closed
P1406	EGR Valve Pintle Position Circuit
P1441	EVAP System Flow During Non-Purge
P1442	EVAP Vacuum Switch Voltage High During Ignition On
P1459	EVAP Emission Purge Flow Switch Malfunction
P1491	EGR Valve Lift Insufficient Detected
P1498	EGR Valve Lift Sensor Voltage High
P1508	IAC System RPM Low
P1509	IAC System RPM High
P1546	A/C Compressor Clutch Output Circuit Malfunction
P1548	A/C Compressor Clutch Output Circuit Malfunction
P1607	PCM Internal Circuit Failure ‘‘A’’
P1618	SPI Communications Error
P1625	PCM Unexpected Reset
P1627	PCM A/D Conversion Malfunction
P1635	5 Volt Reference Voltage Circuit Malfunction
P1640	ODM 1 Input Voltage High (Except 1998 Rodeo)
P1640	ODM Output ‘‘A’’ Circuit Fault (1998 Rodeo)
P1650	Quad Driver Module ‘‘A’’ Fault
P1790	Trans ROM Checksum Error
P1792	Trans EEPROM Checksum Error
P1835	Trans Kickdown Switch Malfunction
P1850	Brake Band Apply Solenoid Malfunction
P1860	TCC PWM Solenoid Circuit Failure
P1870	Transmission Component Slipping

Isuzu Trouble Codes

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Isuzu Trouble Codes

Isuzu OBD1 codes

Isuzu OBD2 codes

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