VOLVO
CEM-3F93 - Accelerator pedal (AP) position sensor. Signal too low
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
This variant applies to the C30, C30 Electric, C70, S40 and V50. The CEM checks the voltage on the signal wire from the accelerator pedal sensor. If the signal is too low, the code is set. The engine may feel sluggish and the accelerator pedal may not respond.
Possible causes
- The signal cable is shorted to ground
- A damaged accelerator pedal sensor
What you can do
- 1With a diagnostic tool, follow the accelerator pedal sensor signal in live data while you slowly press and release the pedal. The value should change evenly
- 2Check that the connector at the accelerator pedal sensor is seated and not corroded or chafed
- 3Use a multimeter to check that the signal wire from the sensor is not shorted to ground
- 4If the wire is intact and the fault remains, replace the accelerator pedal sensor with an identical one
- 5After the work, clear the code and road-test the car
Symptoms you may notice2
- The engine feels sluggish
- The accelerator pedal does not respond
General guidance for car owners. Diagnosis on the car can point to a different cause.