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PACCAR PX-6 CM2150 (2007-09) Fault Code: 253 PID: 98 SPN: 98 FMI: 1 Engine Oil Level – Data Valid But Below Normal Operational Range – Most Severe Level. Very 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 253 are logged in the ECM, it could be possible that the engine was running or keyed on while tilted at an angle severe enough to cause this fault to be triggered.

Possible causes:

1)The engine may not have been 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)Replace the lubricating oil level sensor.

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