Here is the instruction show you guide on how to repair post-oil filter pressure sensor circuit – voltage above normal or shorted to high source.
What You Need?
Cummings inline6 diagnostic adapter
Code:
Fault Code: 1377
PID: S151
SPN: 3549
FMI: 3/3
LAMP: Maintenance
SRT:
Reason:
High signal voltage detected at the oil filter outlet pressure circuit.
Effect:
None on performance.
Circuit Description
The engine control module (ECM) provides a 5 volt supply to the oil filter intake pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The oil filter intake pressure sensor provides a signal to the ECM on the oil filter intake pressure sensor signal circuit. This sensor signal voltage changes, based on the pressure before the oil filters. The ECM will detect a low signal voltage at operating conditions when the oil pressure may be slightly lower. The ECM will detect a high signal voltage during high engine speeds or operating conditions when the oil temperature is low.
Component Location
The post-filter oil pressure sensor is located between the oil filter and the oil cooler.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the engine oil filter intake pressure signal voltage was out of range high.
Action Taken When the Fault Code is Active
The ECM illuminates the white MAINTENANCE lamp or flashes the amber CHECK ENGINE lamp, indicating a maintenance condition, immediately after the diagnostic runs and fails.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The fault code status displayed by the recommended electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
The “Reset All Faults” command in the recommended electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk
Possible causes of this fault code include:
Open return circuit in the harness, connectors, or sensor
Signal circuit shorted to sensor supply or battery voltage
