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2012 jeep grand Cherokee 5.7L
Looking for help or suggestions with a po480 code for fan control circuit,but fan is working. I have noticed after clearing fault code,check engine light will come on as soon as fan comes on. Also noticed that once fan comes on it will not shut off until you shut engine off. I looked at diagrams. It shows a low speed relay in the tipm and another relay inside the tipm on circuit board. I tried pulling relay out when fan was running. Fan shut off but came back on when relay was installed. I am thinking that the relay inside tipm could be sticking on or ground signal from pcm is not shutting off when engine is cooled down. any one have any experience with this issue? Any info would be appreciated.
 

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May be fan caused relay to stick .other words check fan wires at fan then get new relay .sounds like overheated onw or other .temp wize it is coming on at right temp just problem after that point .good luck.
 
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