Oil Pressure Switch Sensor Circuit – Data Erratic, Intermittent or Incorrect
|Fault Code: 435
Oil Pressure Switch Sensor Circuit – 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.
Engine Oil Pressure Switch Circuit
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 engine oil pressure switch is located on the intake side of the engine, on the block, below the fuel filter. Refer to Procedure 100-002 for a detailed component location view.
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:
- Failed engine oil pressure switch
- Open circuit in the engine oil pressure switch signal wire
- Failed ECM
- Short circuit in the engine oil pressure switch signal wire to a voltage source.