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.
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HOMESERVICE MANUALSNISSAN-DATSUN1991240SX LE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES
1991 Nissan-Datsun 240SX LE, Standard
Engine Controls - Tests W/Codes
1991 Nissan-Datsun 240SX LE, StandardSECTION Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Code Charts
- Introduction
- Code 11: Crank Angle Sensor
- Code 12: Mass Airflow Sensor
- Code 13: Engine Coolant Temperature Sensor
- Code 14: Vehicle Speed Sensor
- Code 21: No Ignition Reference
- Code 31: Engine Control Unit (Ecu)
- Code 32: EGR Sensor (CALIF)
- Code 33: Oxygen Sensor
- Code 34: Knock (Detonation) Sensor
- Code 35: EGR Temp. Sensor (CALIF.)
- Code 43: Throttle Position Sensor
- Code 45: Injection Leak
- Code 54: Automatic Transmission Signal
- Summary
RENDER: 1.0x
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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.