VOLVO
AEM-6C52 - Alarm output P1. Signal too low or signal missing. Permanent 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 signal to alarm output P1 is too low or missing, and the fault is still present right now. The alarm does not work at all. The fault is most often a short to ground or a break in the signal wire, or a damaged alarm.
Possible causes
- Signal wire for alarm output P1 shorted to ground
- Break in the signal wire for alarm output P1
- Damaged alarm
What you can do
- 1Look for damage on the signal wire to alarm output P1
- 2Check the alarm connectors for oxidation and loose connections
- 3Clear the code only after the wire has been checked, and confirm that it does not come back
- 4If the fault remains, have the alarm replaced by a workshop after checking
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.