VOLVO
ECM-6400 - Camshaft reset valve, intake Signal missing
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:
7 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008)
Show models by year and engine (13)
- Volvo C30 (2007–2013)2007–2011Engine B5244S4 only
- Volvo C70 (2006–2013)2006All engines except: B5254T3
- Volvo C70 (2006–2013)2007–2010Engine B5244S4, B5244S5 only
- Volvo C70 (2006–2013)2011Engine B5244S4 only
- Volvo S40 (2004–2013)2004All engines except: D4204T, D4204T2
- Volvo S40 (2004–2013)2005–2010Engine 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)2004All engines except: D4204T, D4204T2
- Volvo V50 (2004–2013)2005–2010Engine 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 (ECM) has no signal from the reset valve for the intake camshaft, and the code is set. The fault comes from a break in the signal or supply cable, or from a damaged valve.
Possible causes
- Open circuit in the signal cable
- Open circuit in the power supply cable
- Damaged camshaft reset valve
What you can do
- 1Check the fuse for the circuit to the reset valve
- 2Check the connector at the reset valve for contact resistance and oxidation
- 3With a diagnostic tool: read the valve signal in live data with the engine warm. A wrong signal points to a constant fault
- 4Use a multimeter to check that the cable to the valve is not broken
- 5If you find no fault, have a workshop check the reset valve and the control module
Symptoms you may notice4
- Malfunction indicator lamp lit
- Uneven idle
- Poorer performance
- The engine stalls
What the fault can affect1
- Variable intake camshaft control for the inlet valves is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.