VOLVO
AEM-6C54 - Alarm output S0. Signal too low or signal missing. Intermittent fault
System
Accessory Electronic Module (AEM)
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?
At some point the AEM registered a signal that was too low, or a break, on the S0 alarm output wire while that output was not activated. The fault is intermittent, meaning it is sporadic and may not be present now. The alarm does not work during the fault.
Possible causes
- Signal cable for alarm output S0 shorted to ground
- Break in the S0 alarm output wire
- Damaged alarm
What you can do
- 1Follow the S0 alarm output wire and look for temporary breaks or chafing
- 2Check the alarm connectors for oxidation and loose connections
- 3Clear the code and check whether it returns
- 4If the fault returns, have a workshop check the alarm
Symptoms you may notice1
- The alarm does not work at all
General guidance for car owners. Diagnosis on the car can point to a different cause.