2.2.144. SPN 3251, FMI 3, Particle filter difference pressure sensor: Voltage above normalΒΆ

Description

The WinEEM monitoring system has detect particle filter difference pressure sensor voltage above normal (>4,65V)

Possible causes are:

  • The particle filter difference pressure sensor wiring is defective. (Shorted to high source or open circuit.)
  • The particle filter difference pressure sensor power supply is not correct.
  • The particle filter 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 the DPF difference pressure sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation)
  • Check the 5 V power supply to the sensor
  • Check operation with another DPF difference pressure sensor to see if sensor is defective

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