Posted by Mark Robke on October 13, 2016 at 07:45:58 from (75.117.216.27):
In Reply to: Mack truck stops posted by showcrop on October 12, 2016 at 05:02:07:
The correct way to diagnose this is with a diagnostic computer.You need to read the code(s),and follow the fault tree.If the MIL(lightning bolt) light came on it should have a fault code.It CAN be a low coolant problem,or the sensor.Some engines can be programed to shut down,derate,or just turn on the MIL light for a low coolant fault.Low coolant is the first,most likely scenario,BUT,it can be a lot of other things,too!For example this could be losing ignition power for a moment.This would not log a fault,but,it would change the key on/off count,which the computer keeps.Or another thing,loss of battery power which does make a fault code.Or an oil pressure fault-the list goes on. Check the basics-coolant level,oil pressure,electrical connections,but don't throw parts at it without diagnostics.Mark
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