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Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 435 PID: P100 SPN: 100 FMI: 2/2 LAMP: Amber SRT: |
Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect. An error in the engine oil pressure switch signal was detected by the ECM. |
None on performance. No engine protection for oil pressure. |
 ISB with CM2150 – Engine Oil Pressure Switch Circuit
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Circuit Description
The engine oil pressure switch is used by the electronic control module (ECM) to monitor the lubricating oil pressure. If the oil pressure drops below the engine protection limit, the switch will open and cause Fault Code 435 to log.
The oil pressure switch is normally closed when the engine is not running and open when oil pressure is present.
Component Location
The engine oil pressure switch is located on the front of the engine on the left (intake) side on the top of the front gear housing. Refer to Procedure 100-002 in Section F.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes
This fault code is logged when an open circuit is detected for five consecutive key cycles when the ECM expected a closed circuit at key-on.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
- A default value for the engine oil pressure reading is used.
Conditions for Clearing the Fault Code
The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.
Shop Talk
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM. Refer to Procedure 019-032 in Section.
The oil pressure switch is closed with the engine not running and open when oil pressure is present. This fault code is logged when an open circuit is detected for five consecutive key cycles when the ECM expected a closed circuit at key-on. Possible causes of this fault code include:
- Damaged engine oil pressure switch
- Open circuit in the engine oil pressure switch signal wire
- Damaged ECM
- Short circuit in the engine oil pressure switch signal wire to a voltage source.
Refer to Troubleshooting Fault Code t05-435
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