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Floyd County, Iowa | Many,
- low coolant, low engine oil - but not low enough to derate or shutdown
- engine oil seeps through the wires and fills the connection at the ECM. Take it apart, blow it out. Might fix it.
- new enough it might have a fuel or air restriction
- power wires from the batteries to the ECM starting to corrode
- don't know if that has an A/C light, could be low A/C pressure in system or A/C clutch not engaging
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--------- > But, most trucks have the capability of showing a Flash code. Find out how to show yours, then google it for the code fault. Good Luck.
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Engine Warn light on Cummins M11
