4.2.84. SPN 2659, FMI 1, EGR circulation mass flow rate below normalΒΆ

Description

The EEM monitoring system has detected that EGR circulation rate is below normal.

Possible causes are:

  • Possible leakage in EGR piping
  • The EGR pipe is blocked
  • The shaft between the EGR actuator and the valve is defective.
  • The valve is stuck
  • The EGR actuator is defective

Reaction in EEM

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

NOTE: The present fault is classified as an emission related fault. Engine power will be reduced after a certain time defined by an authority.

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 EGR installation visually to detect possible leakage.
  • Check that the shaft between the actuator and the valve is in order. Shaft should be movable when ignition and ECU is shut OFF.
  • Check the EGR actuator wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).(see Exhaust gas temperature sensor)
  • Check the operation with another EGR actuator.