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.
1992 Infiniti G20 AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Identification
NOTE:
When using trouble code charts, refer to Fig. Fig 1
for symbol identification.
DIAGNOSTIC TROUBLE CODE IDENTIFICATION CHART
| Code | System Affected | Probable Cause | ||||||
|---|---|---|---|---|---|---|---|---|
| 11 (1) | Crank Angle Sensor | (2) No Crank Signal | ||||||
| 12 | Airflow Meter Circuit | Open/Shorted Circuit | ||||||
| 13 | Coolant Temperature Sensor | Open/Shorted Circuit | ||||||
| 14 | Vehicle Speed Sensor (VSS) | No VSS Signal | ||||||
| 21 (1) | Ignition Signal Circuit | (2) Open/Shorted Circuit | ||||||
| 31 | ECU | Signals Not Normal | ||||||
| 32 (3) | EGR Function | No EGR Action | ||||||
| 33 | HO2S Sensor (Left) | Open/Shorted Circuit/High HO2S Signal | ||||||
| 34 (1) | Knock Sensor | Open/Shorted Circuit | ||||||
| 35 (3) | Exhaust Temperature Sensor | Open/Shorted Circuit | ||||||
| 43 | Throttle Sensor | Open/Shorted Circuit | ||||||
| 45 (3) | Injector Leak | Leak At Injectors | ||||||
| 55 (1) | No Malfunction | Normal Condition | ||||||
|
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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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