VOLVO
CEM-P046021 - Fuel Level Sensor A Circuit. General Signal Failures. Signal too low
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerV40 (2013–), V40 Cross Country (2013–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The CEM monitors the direct voltage on the level sensor in the fuel pump. Here the voltage is too low, which comes from the sensor being shorted to earth. The fuel gauge and trip computer can then show too low a fuel level. The code does not name a specific fault type; it only describes the signal level.
Mulige årsaker
- The fuel level sensor on the right-hand side is shorted to earth
Hva du kan gjøre
- 1Compare the fuel gauge with the trip computer and note whether it shows too low a level. Does it change when you refuel?
- 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 earth
- 3With a diagnostic tool, read the fuel level value in live data while the tank is filled and emptied. A value that stays still points to the sensor
- 4Use a multimeter to check that the wire to the fuel level sensor has no contact with earth or the body
- 5Check the connectors in the wiring to the fuel pump for corrosion and loose connections, but do not open the fuel system yourself
- 6Work on the fuel pump or tank is for a workshop, since petrol is flammable
Symptomer du kan merke2
- The trip computer shows a wrong distance to empty
- The fuel gauge shows too low a value
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