Ramforums

So I just tuned my truck with the SC 3815...I checked the codes just for some gits and shiggles and pulled the above code...Which is interesting because I don't have a working temp gauge...ac button...rear defrost button...temp control...or blend door control for the last 2 months...The fan control however does work...I'm assuming this might be my problem...But...The fix?

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Code is UO164 not UP

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U0164 Lost Communication With HVAC Control Module

Sounds like the switches are bad, that would be my first guess, would make sense with all the other problems you listed


(And this should be in the 3rd gen section not the superchips)

I figured since I just programmed it Id out it here...and the switches were already attempted with no avail

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for all your code needs we have a stickie on top the page also

I know what the code means...I'm looking for someone that has had it...and fixed it...

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And for some reason I cant locate the code thread from Tapatalk

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Have you checked relays and fuses?

Fuses yes...relays no...I'm no electrician unfortunately and don't like messing with that stuff to much

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Better start ..lol