2.2.61. SPN 157, FMI 20, Rail Pressure control: Pressure raw value is above maximum offset.ΒΆ

Description

The EEM4 monitoring system has detected a rail pressure sensor error. The rail pressure is above offset during startup or afterrun. Possible causes are:

  • The rail pressure sensor is defective.
  • The rail pressure sensor wiring is defective.

Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates an active fault. The engine functions dependent on the rail pressure are not active.

Solution

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

  • Examine the rail pressure sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
  • Make sure that the 5 V power supply to the rail pressure sensor is correct.
  • Try the operation with another rail pressure sensor to see if the rail pressure sensor is defective.

See Rail pressure sensor for reference.