PACCAR PX-8 CM2150 (2007-09) Fault Code: 435 (ISB) PID: 100 SPN: 100 FMI: 2 Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect. An error in the engine oil pressure switch signal was detected by the ECM.

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.

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:

1)Damaged engine oil pressure switch
2)Open circuit in the engine oil pressure switch signal wire
3)Damaged ECM
4)Short circuit in the engine oil pressure switch signal wire to a voltage source.

Possible repairs:

1)Repair or replace the engine oil pressure switch.
2)Clean the connector and pins.
3)Repair or replace the engine harness.
4)The removal and installation of the connector may correct the fault.
5)Replace the ECM.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 432 PID: SID 230 SPN: 558 FMI: 13 Accelerator Pedal or Lever Idle Validation Circuit – Out of Calibration. Voltage at idle validation on-idle and off-idle circuit does not match accelerator pedal position.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 431 PID: SID 230 SPN: 558 FMI: 2 Accelerator Pedal or Lever Idle Validation Circuit – Data Erratic, Intermittent, or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 431 PID: SID 230 SPN: 558 FMI: 2 Accelerator Pedal or Lever Idle Validation Circuit – Data Erratic, Intermittent, or Incorrect. Voltage detected simultaneously on both idle validation and off-idle validation switches.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 429 PID: 97 SPN: 97 FMI: 4 Water-in-Fuel Indicator Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the water-in-fuel circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 428 PID: 97 SPN: 97 FMI: 3 Water-in-Fuel Indicator Sensor Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the water-in-fuel circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 427 PID: SID 231 SPN: 639 FMI: 9 J1939 Datalink – Abnormal Update Rate. Communication between the electronic control module (ECM) and another device on the SAE J1939 data link has been lost.
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