A/C Off Due to High Engine Temp
 

Just returned from the dealer for second time for the A/C off due to high temp message. The first time they replaced a sencor and this time could not find anything causing message. They contacted GM and GM suggested to check wiring but still no know cause. I asked about reflashing and they advised no new updates for for car so no reason to reflash. The first time it occured I took the battery cables off for several hours but the message came back. The car is stock, all fluids are good. Any suggestions??:mad0259:

hey i had the same issue. I replaced the temp sensor and notices the conector was a flawed design and it was not a tight fit. I changed the pig tail and put a little ele. grease and all is well.

Thanks, I will look at the sensor.

The quick way to reset the sensor is to shut the car down and disconnect the ECM Harness by the fuse box under the hood (front engine compartment, passenger side). I still don't know the cause of this but have had it several times myself.

If you would like for us to research this further for you, please provide us with your first and last name, address, phone number,VIN, mileage and involved dealership. We would be happy to see if there are any options available to you!

Brandon
Chevrolet Customer Service

Brandon,

I'm not sure how to provide you the requested information without posting all of it on the site.

You can click my username and then click send private message.

Brandon
Chevrolet Customer Service

My 2011 LT/RS was the first case to have this issue.. i still have the pictures from it.. they will most likely change out the PCM and that will fix it.. changing the Thermo will most likely not fix it cause it didnt fix mine..

When we had it at the deal, they could not find what was causing the message
and spent several minutes on the phone with GM and still no fix. GM has called and left me message but I haven't been able to speak to anyone yet.

I have the same problem also still not resolved. Never had an issue on my 2010 coupe but my 2012 Vert has had it since 500 miles or so.

DC

A/C Off due to high temp
 

After about 6 months we think we have our problem fixed. We were near a dealership when the message came on and according to the code it was a bad thermostat sensor. They replaced the thermostate Kit (01246-PCKT) The code was PO128. Plus for some reason when I picked the vehicle up, they had put 6 miles on it, not sure if that was necessary. I hope this took care of the problem!:cool:

DeMaro,

We apologize for any frustrations that you may be experiencing. I can research the concern you are having further by setting up a case with GM customer service. Please PM me any details you may have along with your first and last name, address, phone number, VIN, mileage, and involved dealership name.

I await your response via PM.

Brandon
Chevrolet Customer Service

Thanks Brandon
I am going to try a few more things and will take you up on that I am sure.

DC

It is untelling how many times I've had this customer concern. Every time I scanned one, the code was p0128. Engine coolant temp below threshold. Replaced thermostat and it was like it never happened :D

Not saying you all are having different troubles, but 98.3456 times out of 100 a thermostat will fix your problem.

PS: winter months are usually when you see thermostats start to fail, just food for thought.