VOLVO
CEM-3F42 - Supply pedal sensor. Signal too high
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 supplies the clutch and accelerator pedal sensors. If the output gives too high a signal, the code is set. Cruise control is switched off and does not work at all.
Possible causes
- The signal cable is shorted to supply voltage
What you can do
- 1With the ignition on, check that cruise control does not work. Check that the connectors at the clutch and accelerator pedal sensors are seated
- 2Use a multimeter to check that the signal wires to the pedal sensors have no short to supply voltage
- 3Look for chafed or pinched cables at the pedals and free any that are being pinched
- 4After the work, clear the code and check that cruise control works
Symptoms you may notice1
- Cruise control does not work at all
What the fault can affect1
- Cruise control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.