VOLVO
ECM-3563 - Misfire cylinder 6. Emissions impact / catalytic converter damage
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
2 modelsS80 (1999–2006), XC90 (2003–)
Show models by year and engine (2)
What does this fault code mean?
Cylinder 6 is misfiring, and the engine control module chooses the fault code based on how serious the misfire is: either an effect on emissions or a risk of damage to the catalytic converter. The misfire can be detected already at start-up or while driving, and if it continues the catalytic converter may be damaged.
Possible causes
- Low fuel level
- Repeated cold starts that do not let the engine warm up between starts
- Incorrect fuel quality, for example summer fuel in winter
- Water in the spark plug wells
- Damaged VVT unit
- Uneven compression
What you can do
- 1Check that there is fuel in the tank and that the fuel is the correct grade
- 2Check the engine oil level
- 3Check the spark plug in cylinder 6 for damage to the insulation
- 4Look for moisture in the spark plug wells and in the connectors to the ignition coils
- 5If you have a diagnostic tool: read the misfire counter for cylinder 6 at idle and see whether it rises
- 6Have a workshop measure fuel pressure, residual pressure and compression with diagnostic equipment
Symptoms you may notice5
- The malfunction indicator lamp flashes
- The engine misfires
- The engine is difficult to start
- Deterioration in performance
- Uneven idle
What the fault can affect3
- Catalytic converter diagnosis is switched off
- Leak diagnosis is switched off
- Fuel trim is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.