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Engine coolant temperature does not register

(2006 Chevrolet HHR)
in Newbury Park, CA on March 19, 2010
this first happened several thousand miles ago, then suddenly started working properly. now again the guage does not read, the "check engine" indicatoe is lit, and the AC does not work.
Displaying 2 answers & 2 comments
Popular Answer
on April 02, 2010
oh the chevy hhr if the coolant is not above 160deg in the first 10 mins of driving it will go into this no temp gauge and ac will not work the computer thinks the car my be over heating so its in a protect mode.
I have replaced the thermostate 5 times in mine now. 2 times it was bad. I just resently replaced the temp sensoir with a new gm part and seems to be working now.
on July 26, 2010
I have the same exact symptom with my 2006 HHR. where is the temp sensor located - is it accessable for not too handy person (me) to replace?
on April 16, 2011
This is the answer that makes sence. I have been having this happen for a couple of years now. It happens when it is cold out.
on October 04, 2010
My 2007 hhr does the same, went 2 times to warranty and it still doing it.
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