VOLVO
AEM-6C55 - Alarm output S0. Signal too high. 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?
The AEM has registered a signal that is too high on the S0 alarm output wire while that output is activated. The fault is intermittent, meaning temporary, and may not be present now. The alarm does not work while the fault is present.
Possible causes
- Signal cable for alarm output S0 shorted to supply voltage
- Damaged alarm
What you can do
- 1Follow the S0 alarm output wire and look for intermittent shorts to supply voltage
- 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.