Cummins X15 CM2450 X124B (2018 & Newer) Fault Code: 135 PID: PID 100 SPN: 100 FMI: 3 Engine Oil Rifle Pressure 1 Sensor Circuit- Voltage Above Normal or Shorted to High Source

Circuit Description
An engine oil pressure switch or oil pressure sensor is used by the engine control module (ECM) to monitor the lubricating oil pressure. For engines with an oil pressure switch, the switch is normally closed when the engine is not running and open when oil pressure is present. For engines with an oil pressure sensor, the ECM will detect a low signal voltage at operating conditions when the oil pressure is low. The ECM will detect a high signal voltage at operating conditions when the oil pressure is high.

Component Location
The engine oil pressure sensor is located in the oil rifle.

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 pressure signal voltage was greater than 4.75-VDC for more than 16 seconds.

Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
A default value for the engine oil pressure reading is used.
Conditions for Clearing the Fault Code
To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk
If the oil pressure sensor shares supply and return wires in the engine harness with other sensors, opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 135, check for multiple faults.

Possible causes of this fault code include:

Open return circuit in the harness, connectors, or sensor
A signal circuit shorted to sensor supply or battery voltage.

Possible Cause:
1) ECM failure
2) Engine harness