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post #1 of 2 (permalink) Old 06-10-10, 08:02 AM Thread Starter
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pcm?

hey guys newbie here. i have an 06 f150 crew cab fx4. i was driving this past sunday and my temp guage kept going to cold and back up to normal then it finally just stayed at cold. the air also quti working. i hooked it up to the computer and it said it was the cylinder head temp sensor, so i replaced it and the guage is still not working and now its saying its the pcm. what in the world is going on?

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post #2 of 2 (permalink) Old 06-10-10, 07:30 PM
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Re: pcm?

Well, electrical gremlins are the worst. Check the PCM for any breaks in the gasket where moisture might have entered the unit. If the gasket is broken, replacement is a good idea.

It could be a fault somewhere in the wiring, and you may need a new wiring harness but as there's no direct code for that, the computer would say the PCM is bad. It's a difficult problem to solve as the symptoms aren't narrowed down.

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