Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1995 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DTCS
| OEM Code | Description |
|---|---|
| 11 | CRANKSHAFT POSITION (CKP) SENSOR |
| 12 | MASS AIRFLOW (MAF) SENSOR |
| 13 | ENGINE COOLANT TEMPERATURE (ECT) SENSOR |
| 14 | VEHICLE SPEED SENSOR (VSS) |
| 16 | TRACTION CONTROL SYSTEM (TCS) SIGNAL |
| 21 | IGNITION SIGNAL |
| 31 | ECM |
| 32 | EGR FUNCTION |
| 33 | LEFT) HEATED OXYGEN SENSOR (HO2S |
| 34 | KNOCK SENSOR |
| 35 | EGR TEMPERATURE SENSOR |
| 43 | THROTTLE POSITION SENSOR (TPS) |
| 45 | INJECTOR LEAK |
| 46 | SECONDARY THROTTLE POSITION SENSOR (WITH TCS) |
| 51 | INJECTOR |
| 53 | RIGHT) HEATED OXYGEN SENSOR (HO2S |
| 54 | AUTOMATIC TRANSMISSION (A/T) CONTROL |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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