3.2.7. SPN 102, FMI 11, Boost pressure deviation is too highΒΆ

Description

The measured boost pressure differs too much from the desired value.

Possible causes are:

  • The boost air piping is leaking.
  • The EGR pipe is leaking.
  • The turbocharger is defective.
  • The engine is mechanically defective.
  • The turbo waste gate is not moving easily.
  • The waste gate actuator is defective.

Reaction in EEM

The FC is stored and the warning lamp is activated. Engine power will be reduced (Degradation Level 1). The CAN message indicates active fault.

Solution

Find the cause for the low boost pressure indication:

  • Check the boost air system tightness (piping, intercooler).
  • Check the turbo waste gate flap and the condition of the actuator. The actuator should move in the ECU initialization.
  • Check the condition of the turbo charger.
  • Check the mechanical condition of the engine.