VOLVO
AEM-7A14 - Speed signal. Signal too low / high or signal missing. Permanent fault
System
Accessory Electronic Module (AEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The AEM has registered a signal that is too low or too high, or a break, on the speed wire to the radio, and the fault is permanent. The fault normally goes unnoticed by the driver. The cause may be a short to ground or supply voltage, a break in the wire, or a faulty radio.
Possible causes
- Speed wire to the radio shorted to ground
- Speed wire to the radio shorted to supply voltage
- Break in the speed wire to the radio
- Faulty radio
What you can do
- 1Follow the speed wire to the radio and look for chafing or damage that could cause a short or a break
- 2Check the connectors at the radio for oxidation and loose connections
- 3If the fault remains, have the radio replaced by a workshop after checking the wire
Symptoms you may notice1
- No clear symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.