PACCAR PX-8 CM2150 (2007-09) Fault Code: 471 PID: 98 SPN: 98 FMI: 1 Engine Oil Level – Data Valid But Below Normal Operational Range – Least Severe Level. Low oil level has been detected by 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.

If inactive counts of Fault Code 471 are logged in the ECM, it can be possible that the engine was running or keyed on while tilted at an angle severe enough to cause this fault to be triggered.

Other causes of Fault Code 471 can include:

1)The engine was not filled to proper capacity during the most recent oil change
2)External engine oil leaks (oil leaking onto the ground)
3)Internal engine oil leaks (oil leaking into the fuel system or cooling system)
4)High engine oil consumption/power cylinder failure (check for abnormally high blowby when the engine is loaded).

Possible repairs:

1)Add engine lubricating oil to the engine.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 452 PID: 157 SPN: 157 FMI: 4 Injector Metering Rail Number 1 Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the rail fuel pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 451 PID: 157 SPN: 157 FMI: 3 Injector Metering Rail Number 1 Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at rail fuel pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 449 (ISC/ISL) PID: 94 SPN: 157 FMI: 0 Injector Metering Rail Number 1 Pressure – Data Valid But Above Normal Operating Range – Most Severe Level. The ECM has detected that fuel pressure in the fuel rail is higher than the fuel pressure relief valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 449 (ISB/QSB3.3) PID: 94 SPN: 157 FMI: 0 Injector Metering Rail Number 1 Pressure – Data Valid But Above Normal Operating Range – Most Severe Level. The ECM has detected that fuel pressure in the fuel rail is higher than the fuel pressure relief valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 442 PID: 168 SPN: 168 FMI: 0 Battery 1 Voltage – Data Valid but Above Normal Operational Range – Moderately Severe Level. ECM supply voltage is above the maximum system voltage level.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 441 PID: 168 SPN: 168 FMI: 1 Battery 1 Voltage – Data Valid but Below Normal Operational Range – Moderately Severe Level. ECM supply voltage is below the minimum system voltage level.
Back to blog