VOLVO
ECM-640A - Camshaft reset valve. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.
Gjelder følgende modeller:
7 modellerC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Vis modeller per årsmodell og motor (21)
- Volvo C70 Cabriolet (1998–2005)2000Kun motor: B5244S
- Volvo C70 Coupé (1998–2002)1999Kun motor: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Kun motor: B5244S
- Volvo S60 (2001–2009)2001Kun motor: B5244S, B5244S2
- Volvo S60 (2001–2009)2002Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2003–2004Kun motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2005Kun motor: B5244SG, B5244SG2
- Volvo S60 (2001–2009)2006–2008Kun motor: B5244SG
- Volvo S70 (1997–2000)1999Kun motor: B5254S DENSO
- Volvo S70 (1997–2000)2000Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)1999–2000Kun motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2001Kun motor: B5244S, B5244S2, B5244SG
- Volvo S80 (1999–2006)2002–2004Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)2005Kun motor: B5244SG, B5244SG2
- Volvo S80 (1999–2006)2006Kun motor: B5244SG
- Volvo V70 (1997–2000)2000Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2001Kun motor: B5244S, B5244S2, B5244SG
- Volvo V70 (2000–2008)2002Kun motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2003–2004Kun motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2005Kun motor: B5244SG, B5244SG2
- Volvo V70 (2000–2008)2006–2008Kun motor: B5244SG
Hva betyr feilkoden?
The engine control module has received a signal from the camshaft reset valve that does not match what is expected. The valve controls the camshaft position, so when the signal is wrong the camshaft cannot be set correctly. The fault mainly shows up as uneven idle and increased emissions.
Mulige årsaker
- Incorrect signal
- The timing belt has slipped over its teeth
- Low oil pressure or poor oil quality
- Defective reset valve
- Mechanical fault in the VVT unit
Hva du kan gjøre
- 1Read the fault code status in the diagnostic tool and see whether the code is active or stored, and whether other codes are stored
- 2Check the engine oil level and quality, and make sure the oil is not contaminated
- 3Have a workshop check the timing belt teeth and that the camshaft sits in the correct position
- 4Have a workshop check that the VVT unit and the reset valve work mechanically, and clean the valve if it is dirty
- 5Replace the reset valve if the fault remains after the checks above
Symptomer du kan merke2
- Uneven idle
- Increased emissions
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.