2.2.256. SPN 4795, FMI 12, Particle filter: DPF removal detected (Pressure based)

Description

The WinEEM monitoring system has detected possible DPF (diesel particle filter) removal.

Possible causes are:

  • The DPF has been removed
  • The DPF has leakage
  • The DPF pressure pipes to the difference pressure sensor have a leak.
  • The DPF difference pressure sensor is defective

Reaction in EEM

The FC is stored and the fault lamp is activated. The CAN message indicates an active fault. NOTE: The present fault is classified as an emission related fault. Engine power is reduced after a certain time defined by an authority.

Solution

First save the error log and then do the procedure that follows:

  • Check that DPF hasn’t been removed
  • Check the DPF for possible leakage
  • Check the DPF difference pressure sensor pressure pipes for possible leakage
  • Check the DPF difference pressure sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).

See Diesel particulate filter (DPF) difference pressure sensor sensor for reference.