PACCAR PX-6 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.