2.2.25. SPN 109, FMI 4, Coolant pressure sensor voltage below normalΒΆ

Description

The measured coolant pressure sensor voltage signal is below the normal operating range.

Possible causes are:

  • The coolant pressure sensor wiring is defective. (Shorted to ground.)
  • The coolant pressure sensor 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 do the procedure that follows:

  • Examine the coolant pressure sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
  • Try operation with another coolant pressure sensor to see if the sensor is defective.

See Coolant pressure sensor for reference.