VOLVO
REM-6A03 - Relay, central locking. Signal too low
System
Rear Electronic Module (REM)
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–)
What does this fault code mean?
The rear electronic module (REM) monitors the output signal going to the central locking relay coil. If the signal is missing or too low, the code is set, and a door, the fuel filler cap or the boot lid may then not lock or unlock.
Possible causes
- Oxidation on the relay base contacts
- The relay is loose or missing
- Defective relay
What you can do
- 1Check that the central locking relay is firmly seated and that the contacts in its base are not oxidised
- 2If you have a diagnostic tool, activate the relay and listen for a click
- 3If the fault remains, have a workshop replace the relay and check the control module
Symptoms you may notice3
- A door does not lock or unlock
- The fuel filler cap does not lock or unlock
- The boot lid does not lock or unlock
General guidance for car owners. Diagnosis on the car can point to a different cause.