4.2.236. SPN 520245, FMI 31, Rail PRV reached maxium allowed opening countΒΆ

Description

EEM4 system has detected that PRV has reached maxium allowed opening count(> 100). PRV need to be changed.

Reaction in EEM

The FC is stored and the warning lamp is activated. Engine power is heavily reduced (Degradation Level 3). The CAN message indicates active fault. The engine functions dependent on the rail pressure are not active.

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:

  • Change the PRV.

NOTE: The fuel rail component removal, inspection and replacement should be performed only by qualified injection system service personnel. Special instructions may apply.

  • Check the ECU operation with another EEM4 controller. If the system is functional and the fault is not active with the replacement ECU, then the original ECU is defective.