Infiniti Trouble Code Info

Infiniti

Without OBD II

On G20 models, the ECU is located behind the center console. On J30, M30 and Q45 models, the ECU is located behind the RH kick panel.

If a malfunction occurs within the ECU/fuel injection system, a diagnostic trouble code may be stored in the ECU and the ‘‘Check Engine’’ lamp will blink. There is also a lamp built into the ECU which will concurrently blink. To read Code output, proceed as follows:

  1. Turn ignition On, but do not start engine.
  2. Using a small screwdriver, turn diagnostic mode selector switch, located on side of ECU, fully clockwise.
  3. Wait two seconds, then rotate switch to full counterclockwise position.
  4. A malfunction code can be read as the long (0.6 second) blink, indicating the first digit of a two digit number and the short (0.3 second) blink, indicating the second digit.

Ensure that the diagnostic switch is to the full counterclockwise position whenever the vehicle is in use.

w/OBD II

On G20 and I30 models, connect a suitable Scan Tool to the DLC, located under instrument panel fuse box cover.

On J30, Q45 and QX4 models, connect a suitable Scan Tool to the DLC, located under or on lower portion of instrument panel.

Clearing Codes

If using a scan tool, follow tool manufacturer’s instructions to clear Codes.

A second, though more time consuming method of clearing Codes involves using a small screwdriver to turn the diagnostic mode selector switch, located on the side of the ECM/ECU, fully clockwise. After waiting two seconds, rotate the switch to the full counterclockwise position. The diagnosis will end and memory will then be cleared.

Check Engine Lamp

11

Crank Angle Sensor

12

Mass Air Flow Sensor

13

ECT Sensor

14

Vehicle Speed Sensor

16

TCS Signal

21

Ignition Signal Circuit

25

Idle Air Control Valve

22

Fuel Pump Control

31

ECM

32

EGR Function

33

Heated Oxygen Sensor

34

Knock Sensor

35

EGR Temperature Sensor (RH)

41

Intake Air Temperature Sensor

42

Fuel Pump Sensor

43

Throttle Position Sensor

45

Injector Leak

46

Secondary Throttle Sensor

51

Injector Analysis

53

EGR Temperature Sensor (LH)

54

Signal Circuit From A/T Control Unit To ECM

65-71

Single Cylinder Or Multiple Cylinder Misfire

72

Three Way catalyst Function

76

Fuel Injection System Function

77

Rear Heated Oxygen Sensor

82

Crankshaft Position Sensor

84

A/T Diagnosis Communication Line

91

Front Heated Oxygen Sensor Heater

103

Park/Neutral Position Switch

105

EGR & Canister Control Solenoid

OBD2 Codes

P0000

No Self Diagnostic Failure Indicated

P0100

MAF Sensor

P0105

Absolute Pressure Sensor

P0110

IAT Sensor

P0115

ECT Sensor

P0120

TP Sensor

P0125

ECT Sensor

P0130

Closed Loop, Bank 1 Or Front O2S, Bank 1

P0131

Front O2 Sensor, Bank 1 Lean Shift Monitoring

P0132

Front O2 Sensor, Bank 1 Rich Shift Monitoring

P0133

Front O2 Sensor, Bank 1 Response Monitoring

P0134

Front O2 Sensor, Bank 1 High Voltage

P0135

Front HO2S Heater, Bank 1

P0136

Rear O2S, Bank 1

P0137

Rear O2S, Bank 1 Minimum Voltage Monitoring

P0138

Rear O2S, Bank 1 Maximum Voltage Monitoring

P0139

Rear O2S, Bank 1 Response Monitoring

P0140

Rear O2S, Bank 1 High Voltage

P0141

Rear H02S Heater, Bank 1

P0150

Closed Loop, Bank 2 Or Front O2S, Bank 2

P0151

Front O2 Sensor, Bank 2 Lean Shift Monitoring

P0152

Front O2 Sensor, Bank 2 Rich Shift Monitoring

P0153

Front O2 Sensor, Bank 2 Response Monitoring

P0154

Front O2 Sensor, Bank 2 High Voltage

P0155

Front HO2S Heater, Bank 2

P0156

Rear H02S Sensor, LH Bank

P0157–P0160

Rear O2S, Bank 2

P0161

Rear H02S Heater, LH Bank Or Bank 2

P0171

Fuel System Lean, Bank 1

P0172

Fuel System Rich, Bank 1

P0174

Fuel System Lean, Bank 2

P0175

Fuel System Rich, Bank 2

P0180

Tank Fuel Temp Sensor

P0300

Random Misfire

P0301–P0308

Misfire, Cylinder No. 1–8

P0325

Knock Sensor, Bank 1

P0330

Knock Sensor, Bank 2

P0335

CKP Sensor (Pos)

P0340

CMP

P0400

EGR System

P0402

EGRC/BPT Valve

P0403

EGR Volume Control Valve Circuit

P0420

TW Catalyst System, Bank 1

P0430

TW Catalyst System, Bank 2

P0440

EVAP Small Leak

P0443

Purge Control/V & S/V

P0446

Vent Control Valve

P0450

EVAP Pressure Sensor

P0500

Vehicle Speed Sensor

P0505

IACV/AAC Valve

P0510

Closed TP Sensor

P0600

A/T Comm Line

P0605

ECM/ECU

P0705

PNP Or Inhibitor Switch

P0710

ATF Temp Sensor

P0720

VSS A/T

P0725

Engine Speed Signal

P0731

A/T 1ST Signal

P0732

A/T 2ND Signal

P0733

A/T 3RD Signal

P0734

A/T 4TH Signal Or TCC

P0740

TCC SV Solenoid

P0744

A/T TCC Signal

P0745

Line Pressure S/V

P0750

Shift Solenoid/V A

P0755

Shift Solenoid/V B

P1105

MAP/BARO Switch SOL/V

P1110

Intake Valve Timing Control, LH Bank

P1120

TP Sensor 2

P1125

Tandem TP Sensor

P1130

Swirl Control Valve Control Solenoid Valve

P1135

Intake Valve Timing Control, RH Bank 2

P1140

Intake Valve Timing Control Position Sensor, LH Bank 1

P1145

Intake Valve Timing Control Position Sensor, RH Bank 2

P1148

Closed Loop, Bank 1

P1165

Swirl Control Valve Control Vacuum Check Switch

P1168

Closed Loop, Bank 2

P1210

Traction Control Signal Circuit

P1220

FPCM

P1320

Ignition Signal, Primary

P1335

CKP Sensor (Ref)

P1336

CKP Sensor (POS) Cog

P1400

EGRC Solenoid/V

P1401

EGR Temp Sensor

P1402

EGR System

P1440

EVAP Small Leak

P1441

VC/V Bypass/V

P1443

Canister Control Vacuum Check Switch

P1444

Purge Volume Control/V

P1445

Purge Volume Control/V

P1446

Vent Control Valve

P1447

EVAP Purge Flow

P1448

Vent Control Valve

P1490

VC/V Bypass/V

P1491

VC Cut/V Bypass/V

P1492

Purge Control/V S/V

P1493

Purge Control/V & S/V

P1605

A/T Diag Comm Line

P1705

TP Sensor A/T

P1706

PNP Switch

P1760

Overrun Clutch S/V

P1900

Cooling Fan