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 MANUALSVOLVO1993960 4D WAGON, AW30-43REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODESSELF-DIAGNOSTIC SYSTEMFAULT CODE DEFINITION
1993 Volvo 960 4D Wagon, AW30-43
Fault Code Definition
1993 Volvo 960 4D Wagon, AW30-43SECTION Fault Code Definition
FAULT CODES
| Code | Fault | Repair | ||||
|---|---|---|---|---|---|---|
| 1-1-1 | No Faults | None | ||||
| 1-1-2 | ECU | Replace ECU | ||||
| 1-1-3 | Fuel Injectors | Check Fuel Injectors | ||||
| 1-2-1 | Mass Airflow Signal | (1) Check Airflow Meter & Main Relay | ||||
| 1-2-3 | Coolant Temperature Sensor Signal | (1) Check Sensor | ||||
| 1-3-1 | Timing Pick-Up Signal | (2) | ||||
| 1-3-2 | Battery Voltage | (2) | ||||
| 1-4-3 | No Front Knock Sensor Signal | (2) | ||||
| 2-1-2 | Oxygen Sensor Signal | (1) Check Oxygen Sensor | ||||
| 2-1-4 | Timing Pick-Up Signal | (2) | ||||
| 2-2-3 | No Idle Valve Signal | (2) | ||||
| 2-3-1 | Lambda Rich/Lean In Part Load Range | (2) | ||||
| 2-3-2 | Lambda Rich/Lean At Idle | (2) | ||||
| 2-3-3 | Idle Control Not In Range | (2) | ||||
| 2-4-1 | EGR Flow Too Low | (2) | ||||
| 2-4-3 | Throttle Switch Signal Absent Or Faulty | (2) | ||||
| 3-1-1 | Speedometer Signal | (2) | ||||
| 3-1-4 | Camshaft Sensor Signal | (2) | ||||
| 3-2-2 | Airflow Meter Hot Wire | (2) | ||||
| 4-1-3 | EGR Temperature Sensor Absent/Faulty | (2) | ||||
| 4-3-3 | No Rear Knock Sensor Signal | (2) | ||||
| 5-1-2 | Short Term Fuel Trim | (2) | ||||
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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.