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P0480 2000 3.8l K


I_69_98
10-10-2008, 01:42 AM
I've had this problem for quite some time. I change out fan relay and thermostat as well. I did this before I purchased my scanner. Got code P0480, what do I do? Can some give me tips on how troubleshoot codes.:confused:
BNaylor
10-10-2008, 10:11 AM
Welcome to AF.

Does cooling fan #1 even work? This DTC is associated with an output driver electrical integrity problem at the PCM module level. The output state is invalid.
I_69_98
10-10-2008, 08:29 PM
Welcome to AF.

Does cooling fan #1 even work? This DTC is associated with an output driver electrical integrity problem at the PCM module level. The output state is invalid.

UPDATE:

I checked both fans, by passing and hooking it up directly to the battery. Both work. I also rescanned and the code reset. PCM module? Sensor? I'm newbie when dealing with DTC. :confused:
BNaylor
10-10-2008, 09:10 PM
Then that leaves either wiring problems from the output of the PCM module to cooling fan relay #1 and from the relay to the cooling fan or an internal PCM issue.
I_69_98
10-11-2008, 02:06 AM
Update:
I tested the AC, the AC ran and both fan 1 and fan 2 worked. The car ran without shutting off. But another problem arise AC shuts down (fade away) it only works when it wants to. Back to the fans , can the problem be caused by the cooling switch? :confused:

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