VOLVO
ECM-600B - Turbocharger (TC) control valve. Signal missing. Permanent fault
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:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (14)
- Volvo S60 (2001–2009)2005–2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2008–2009Engine B5204T5, B5244T5, B5254T2 only
- Volvo S80 (1999–2006)2005–2006Engine B5204T5, B5244T4, B5254T2, B6294S2, B6294T only
- Volvo V70 (2000–2008)2005Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2006–2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2008Engine B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2005All engines except: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2007Engine B5254T2 only
- Volvo XC90 (2003–)2005–2006Engine B5254T2, B6294T only
- Volvo XC90 (2003–)2007–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
The fault is present now: the engine control module (ECM) cannot detect a signal from the turbocharger control valve and has registered an open circuit in the signal cable. This happens when boost pressure is regulated, and the fault remains until it has been put right.
Possible causes
- Open circuit in the signal cable to the valve
- Loose or oxidised connector at the valve
- Open circuit in the power cable to the valve
- Damaged turbocharger control valve
What you can do
- 1Check that the connector at the turbocharger control valve is firmly seated and free from oxidation
- 2Switch off the ignition, disconnect the connector, clean it and reconnect it
- 3With a diagnostic tool: switch the ignition on, activate the valve and listen for a click. A click points to poor contact in the connector
- 4Use a multimeter to check that the cable to the valve is not broken or short-circuited to ground
- 5If the fault remains after these checks, have a workshop with diagnostic equipment check the valve
Symptoms you may notice1
- Malfunction indicator lamp lit
General guidance for car owners. Diagnosis on the car can point to a different cause.