My attention was directing to the cause of engine light on. Codes turned up
transmission sensor, misfiring on the 6th cylinder and the egr valve . Then the
suv decided it was going to leak coolant, truck is not running hot and does not
leak all the time.
Look at the spark plugs, see why the misfire is on Cyl 6. Could also be the coil. Fix the coolant leak.
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