4.2.93. SPN 2791, FMI 7, EGR Valve position deviationΒΆ

Description

EGR actuator difference between actual and target shaft position is too high. The error will heal when the difference grows smaller.

Possible causes are:

  • The EGR actuator is defective
  • The EGR actuator shaft is twisted or blocked.
  • The CAN bus is defective

Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates active fault.

Solution

First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:

  • Check the mechanical functionality of EGR valve.
  • Check the EGR actuator assembly to detect the defective control shaft.
  • Check the operation with another EGR actuator to see if the actuator is defective.