CEL On U0164

kholy · 08-23-2012, 01:57 PM

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

cdoxp800 · 08-23-2012, 02:10 PM

looks like something is unplugged to me. Have you checked all the connections?

kholy · 08-23-2012, 02:45 PM

Quote:

Originally Posted by cdoxp800

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.

Nissanboy · 08-24-2012, 04:06 PM

"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

kholy · 08-26-2012, 08:09 PM

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

Nism0 · 12-04-2013, 06:17 PM

Friend having similar problem. OP, did you ever solve the issue?

08-23-2012, 01:57 PM	#1 (permalink)
kholy Base Member Join Date: Aug 2010 Location: Ohio Posts: 218 Drives: 370z Sport Touring Rep Power: 14	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 __________________ 2009 Pearl White 370z Sport Touring Edition

08-23-2012, 02:10 PM	#2 (permalink)
cdoxp800 A True Z Fanatic Join Date: May 2009 Location: FL Posts: 1,337 Drives: 2011 Nismo Rep Power: 18	looks like something is unplugged to me. Have you checked all the connections? __________________ 2011 Brilliant Silver NISMO 370z. #: 0046. PPE LTH \| MillSpec Cats \| F.I Exhaust \| Akuma Intakes \| Rotora 6/4 Brakes

08-26-2012, 08:09 PM	#5 (permalink)
kholy Base Member Join Date: Aug 2010 Location: Ohio Posts: 218 Drives: 370z Sport Touring Rep Power: 14	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 __________________ 2009 Pearl White 370z Sport Touring Edition

12-04-2013, 06:17 PM	#6 (permalink)
Nism0 Enthusiast Member Join Date: Jan 2012 Location: North Carolina Posts: 405 Drives: '19 Nismo Tech Rep Power: 13	Friend having similar problem. OP, did you ever solve the issue? __________________ '08 350z Enthusiast '10 370z 40th Anniversary '19 370z Nismo Tech

08-24-2012, 04:06 PM	#4 (permalink)
Nissanboy Enthusiast Member Join Date: Dec 2010 Location: H-Town Posts: 378 Drives: Too slow Rep Power: 14	"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