VOLVO
ECM-640F - Camshaft position, intake. Signal too low
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:
6 modelsC70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008)
Show models by year and engine (10)
- Volvo C70 (2006–2013)2006All engines except: B5254T3
- Volvo S40 (2004–2013)2004Engine B5244S4, B5244S5 only
- Volvo S40 (2004–2013)2005–2006Engine B5244S4, B5244S5, B5244S7 only
- Volvo S60 (2001–2009)2005–2006Engine B5244S, B5244S2, B5244S6 only
- Volvo S60 (2001–2009)2007–2009Engine B5244S, B5244S2 only
- Volvo S80 (1999–2006)2005–2006Engine B5244S, B5244S2 only
- Volvo V50 (2004–2013)2004Engine B5244S4, B5244S5 only
- Volvo V50 (2004–2013)2005–2006Engine B5244S4, B5244S5, B5244S7 only
- Volvo V70 (2000–2008)2005–2006Engine B5244S, B5244S2, B5244S6 only
- Volvo V70 (2000–2008)2007–2008Engine B5244S, B5244S2 only
What does this fault code mean?
The engine control module checks that the intake camshaft is at the correct position relative to the crankshaft. If the position deviates, the adaptation is adjusted, and the fault code is stored when the adaptation becomes too large. The code applies when the camshaft position is too low in relation to the crankshaft.
Possible causes
- Poor oil quality
- The timing belt has jumped over the teeth
- Incorrectly adjusted camshafts
- Damaged reset valve
What you can do
- 1Check the engine oil level and quality, and look for contamination in the oil
- 2Have a workshop check that the timing belt position relative to the camshafts matches the markings on the engine
- 3Have a workshop adjust the camshaft settings so they are correctly positioned relative to the crankshaft
- 4Have a workshop check the reset valve and replace it if it is damaged
- 5After the work, check whether the symptoms you noticed are still present
Symptoms you may notice4
- Malfunction indicator light (MIL) lit
- Uneven idle
- Increased emissions
- Engine stalls while driving
General guidance for car owners. Diagnosis on the car can point to a different cause.