VOLVO
CEM-P134622 - Fuel Level Sensor B Circuit. General Signal Failures. Signal too high
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsV40 (2013–), V40 Cross Country (2013–)
Show models by year and engine (2)
What does this fault code mean?
The ejector-side sensor gives the CEM too high a voltage, because it is shorted to supply voltage. The fuel gauge can then show too high a level, and the trip computer calculates the range wrongly. The fault is on the V40 and can come back until it is fixed.
Possible causes
- This sensor is shorted to supply voltage
What you can do
- 1Note whether the fuel gauge shows more fuel than you have added. That is a clear sign that the sensor is suspect
- 2Check the fuel pump and level sensor fuses in the engine bay and the CEM. If one has blown, check its circuit for a short to supply
- 3Use a multimeter to check that the wire to this sensor has no contact with supply voltage
- 4With a diagnostic tool, read the fuel level value in live data while refuelling and while driving. A value that does not follow consumption is a clue
- 5Check the connectors in the wiring for corrosion and loose connections
- 6The sensor should be replaced by a workshop, since the fuel system is flammable
Symptoms you may notice2
- The trip computer shows a wrong distance to empty
- The fuel gauge shows too high a value
General guidance for car owners. Diagnosis on the car can point to a different cause.