2007 Freightliner Columbia Check Engine Light and Fan
I have a 2007 Freightliner Columbia with a 14L Series 60 Detroit in it.
1) The Check Engine light is coming on as we pull a hill or riding the Jake down hill. It turns off as soon as we completely let out foot off the throttle. Then will come back on after a few minutes.
2) The engine fan is turning on at 180-190 degrees and is staying on for several minutes even after the temp is at a normal or even below.
Our fuel mileage has dropped nearly 1.75 MPG! Any suggestions or is it time to find a cliff and push it off?
Thanks in advance Friends...
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