VOLVO
REM-3C01 - Relay, preheating the diesel filter. Signal too high
System
Rear Electronic Module (REM)
Volvo models this fault code applies to
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 (10)
- Volvo S60 (2001–2009)2001Engine D5244T only
- Volvo S60 (2001–2009)2002–2003Engine D5244T, D5244T2 only
- Volvo S60 (2001–2009)2004Engine D5244T, D5244T2, D5244T3 only
- Volvo S80 (1999–2006)2001Engine D5244T only
- Volvo S80 (1999–2006)2002–2004Engine D5244T, D5244T2 only
- Volvo V70 (2000–2008)2001Engine D5244T only
- Volvo V70 (2000–2008)2002–2003Engine D5244T, D5244T2 only
- Volvo V70 (2000–2008)2004Engine D5244T, D5244T2, D5244T3 only
- Volvo V70 XC / XC70 (2001–2007)2003–2004Engine D5244T only
- Volvo XC90 (2003–)2003–2004
What does this fault code mean?
The rear electronic module (REM) controls the relay for preheating the diesel filter and checks the signal to the relay coil. The code is stored when that signal is too high, which is caused by a defective relay with a short circuit in its coil. The fault can make the engine hard to start or stop it from starting altogether.
Possible causes
- Defective relay
- Short circuit in the relay coil
What you can do
- 1Read the fault code, clear it and test drive the car
- 2Check that the diesel filter preheating relay is seated firmly and does not appear to be damaged
- 3If the relay is damaged or the fault remains, have a workshop replace it
Symptoms you may notice2
- The engine does not start
- The engine is hard to start
General guidance for car owners. Diagnosis on the car can point to a different cause.