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Infiniti Check Engine Codes

67K views 64 replies 38 participants last post by  krazyblunts 
#1 ·
Can someone make this a sticky?

http://www.troublecodes.net/infiniti/


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

96 & newer vehicles are OBD2 systems
and REQUIRE A SCANNER, unless otherwise stated.
Warning: Please check for manufacturer specific codes and
confirm the trouble code descriptions with an appropriate manual.
Disclaimer: We cannot guarantee the accuracy of all trouble codes.
We try and make them as accurate as we can, but sometimes we all make mistakes.
 
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#4 ·
#6 ·
#7 ·
It would be good if also the codes for the Euro-cars would have been included
There is a whole bunch of codes for CVT-equipped cars for instance. Not all cars on this forum are US-versions. I will try to post some codes as soon as i can.
I'm right in the middel of that....
 
#9 ·
Sorry i know kinda old thread but the whole 96 and newer is not true....my car is OBD-II and its a 95.....just a litte tidbit for some of you guys...
 
#12 ·
soooo i wouldnt be able to use that consult on my 94 correct?
 
#15 ·
Its "ignition signal, primary", your looking at the one above it.

P1320:

Malfunction is detected when:
The ignition signal in the primary circuit is not entered during engine cranking or running.

Items to check:
Harness or connectors (the ignition primary circuit is open or shorted).
Power transistor unit
Resistor
Cam position sensor
Cam position circuit
 
#18 ·
I have a '95 and it has the check engine light on. I need to find out how to read the codes. I am NOT going to pay to have the codes read when I can get it done myself. I have pulled the kick panels off on both sides, I am seeing a socket in the fuse panel access. Again this is a '95 G20 with a manual transmission. I have looked under the dash and felt around behind the centre console. There is no screw. Any advice will be greatly appreciated.
 
#23 ·
No, removing the passenger side kick panel on the center console allows you access to the ECU, and by following the instructions in the first post of this thread, you will turn the screw accordingly on the ECU to get code that flashes in the led which tells you why you have a CEL (or Check Engine Light) code. When you understand why you have a code, read up on ways on how to fix your problem.

Glad to see this thread went sticky, I just picked up a 99 touring, that has been molested pretty bad under the hood with bolt on garbage (vacuum lines torn up, missing various parts under the hood, still threw another cell last night 20 miles after I replaced the CPS). This will come in handy the next few days, thanks again.
 
#25 ·
You're probably right, I haven't gone after the screw yet on my 99 touring. I used the "stealership" scan tool (place where I purchased my car from) to run the diagnostics. No scan tool means I'll probably be following what you said.

But I'm almost positive on my previous 93.5 p10, that removing the passenger side kick panel is the place to go to find that diagnostic screw. Its been a couple years, but I'm pretty sure its right.
 
#27 ·
I have an issue I have p0137 and p0138. I changed the oxygen sensor with an aftermarket and I'm getting the same codes. I read somewhere that the aftermarket sensors don't work, however I think its perhaps too much of a coincidence I'm getting the exact same codes.

What else could this be? I've heard fuel system, exhaust leak or short, but fuel system problem is the only common denominator in these two codes. This is what I've done so far.

I'm running injector cleaner have grounded the maf and put a new fuel filter on. Any other suggestions. Cap, rotor and spark plugs where done 1 year ago/ about 9k miles. I thought I'd clean the maf as well. I don't have an exhaust leak.

How would I check for a short/electrical issue?
 
#28 ·
I think one is wrong on the list.

EGR Volume Control Valve Circuit

P0420

My check engine came on, and the scanner told me that P0420 is Catalyst Efficiency Below Threshold Bank 1 and not a EGR volume control valve. I googled it as well and my findings seem to be correct.

Can anyone confirm this?
 
#29 ·
Correct, I have had this once or twice too.
 
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