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PACCAR PX-8 CM2150 (2007-09) Fault Code: 252 PID: 98 SPN: 98 FMI: 2 Engine Oil Level – Data Erratic, Intermittent, or Incorrect. An intermittent signal is being received from the oil level sensor.
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, recalibrate the ECM.
Possible causes:
1)The oil level sensor is not receiving power from the ECM. This could be caused by an open circuit in the power supply or low voltage supplied by the primary engine ECM
2)Open return circuit on the oil level sensor circuit between the engine ECM and the oil level sensor
3)Open or short circuit on the oil level sensor signal circuit between the ECM and oil level sensor
4)A damaged oil level sensor.
Possible repairs:
1)Repair or replace the engine harness.
2)Replace the ECM.
3)Replace the oil level sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 249 PID: 171 SPN: 171 FMI: 3 Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at ambient air temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 245 PID: SID 033 SPN: 647 FMI: 4 Fan Control Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fan control circuit when commanded ON.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 242 PID: 84 SPN: 84 FMI: 10 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change. Signal indicates an intermittent connection or VSS tampering.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 241 PID: 84 SPN: 84 FMI: 2 Wheel-Based Vehicle Speed – Data Erratic, Intermittent, or Incorrect. The ECM lost the vehicle speed signal.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 239 PID: SID 232 SPN: 3511 FMI: 3 Sensor Supply 3 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at sensor supply number 3 circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 238 PID: SID 232 SPN: 3511 FMI: 4 Sensor Supply 3 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected on the +5 volt sensor supply circuit to the engine speed sensor.