VOLVO
ECM-640A - Camshaft reset valve. Faulty signal
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
7 ModelleC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Modelle nach Baujahr und Motor anzeigen (21)
- Volvo C70 Cabriolet (1998–2005)2000Nur Motor: B5244S
- Volvo C70 Coupé (1998–2002)1999Nur Motor: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Nur Motor: B5244S
- Volvo S60 (2001–2009)2001Nur Motor: B5244S, B5244S2
- Volvo S60 (2001–2009)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2003–2004Nur Motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2005Nur Motor: B5244SG, B5244SG2
- Volvo S60 (2001–2009)2006–2008Nur Motor: B5244SG
- Volvo S70 (1997–2000)1999Nur Motor: B5254S DENSO
- Volvo S70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)1999–2000Nur Motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2001Nur Motor: B5244S, B5244S2, B5244SG
- Volvo S80 (1999–2006)2002–2004Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)2005Nur Motor: B5244SG, B5244SG2
- Volvo S80 (1999–2006)2006Nur Motor: B5244SG
- Volvo V70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2001Nur Motor: B5244S, B5244S2, B5244SG
- Volvo V70 (2000–2008)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2003–2004Nur Motor: B5244S, B5244S2, B5244S6, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2005Nur Motor: B5244SG, B5244SG2
- Volvo V70 (2000–2008)2006–2008Nur Motor: B5244SG
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- 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
Was Sie tun können
- 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
Symptome, die Sie bemerken können2
- Uneven idle
- Increased emissions
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.