Isuzu Trouble Codes

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Contents

Isuzu Trouble Codes

Isuzu OBD1 codes

12

System Diagnostic - Ready

13

Oxygen sensor or circuit

14

Coolant Temperature Sensor Circuit

High Coolant Temperature{5}

14A

High Coolant Temperature{6}

14B

Low Coolant Temperature{6}

15

Coolant Temperature Sensor Circuit

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

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}

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}

Power Transistor System{9}

36

MAP Sensor Circuit{4}

41

Crank Angle Sensor{9}

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

Fuel Metering{9}

45

Oxygen sensor (rich condition indicated)

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}

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

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)

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)

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)

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)

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

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