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CEL On U0164

So after i installed headers/downpipes/exhaust on my 370z everything was fine for around 2 weeks... i then saw the CEL come on and about 3 days later went away... it

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Old 08-23-2012, 02:57 PM   #1 (permalink)
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Default CEL On U0164

So after i installed headers/downpipes/exhaust on my 370z everything was fine for around 2 weeks... i then saw the CEL come on and about 3 days later went away... it did this a few times for next month then was off for a while... however last week it came on and stayed on and i checked the code and this was what i got

U0164 Generic DTC: Lost Communication With HVAC Control Module

and my AC also does not seem to work so my question to you is will nissan void this since i did header work and what not?

very nervous to take this in
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Old 08-23-2012, 03:10 PM   #2 (permalink)
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looks like something is unplugged to me. Have you checked all the connections?
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Old 08-23-2012, 03:45 PM   #3 (permalink)
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Quote:
Originally Posted by cdoxp800 View Post
looks like something is unplugged to me. Have you checked all the connections?
i was looking all around i couldnt find anything i will put car back up on stands and see what i can find.
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Old 08-24-2012, 05:06 PM   #4 (permalink)
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"U" codes are CAN network related codes, either no connection or no communitaction between moduels. Either something is unplugged or there is an open in the circuit somewhere.

CAN wires are a pair of wires wrapped around each other; hope that helps
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Old 08-26-2012, 09:09 PM   #5 (permalink)
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so i thought of something i had a bluetooth ODBII device that was kinda lose in there... i pulled it but it didnt go away right away thought about resetting by pulling battery to see
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Old 12-04-2013, 07:17 PM   #6 (permalink)
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Friend having similar problem. OP, did you ever solve the issue?
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