What could be causing engine hot turn ac off message

Asked by Damon Jun 28, 2022 at 03:21 AM about the 2010 Chevrolet Impala LT FWD

Question type: Maintenance & Repair

Okay so this has been been a problem on and
off for about a year now. I’ve had the radiator
flushed, thermostat replaced twice, replaced
coolant temp sensor, I have also checked
spark plugs and other various things to verify
head gasket isn’t blown. The heat still works
and so does the ac when this message pops
up. The temp gauge drops below cold and
does not read. The vehicle only has 42k miles
on it has never been beaten on or driven hard.
I don’t know where to go next. Could it be a
bad ground? Any advice would help Thank
you in advance.

1 Answer
155,245

james answered about a year ago

Sounds like you have a bad connection in the wiring going to the coolant temperature sensor. This would explain the temperature gauge on the dash dropping to cold and the engine hot message. When the computer loses the signal from the coolant temperature sensor it assumes the engine is overheating and takes steps to prevent serious engine damage such as disabling the air conditioner. Also, GMs for some reason don't like aftermarket coolant temperature sensors. Replace it with an AC Delco sensor and check the wiring going to the sensor. Hope that helps! Jim

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • What could be causing engine hot turn ac off message 1 Answer

    Okay so this has been been a problem on and off for about a year now. I’ve had the radiator flushed, thermostat replaced twice, replaced coolant temp sensor, I have also checked spark plugs and ot...

    2010 Chevrolet Impala LT FWD

    -

    Maintenance & Repair

  • engine hot ac off 2 Answers

    my car barely started after getting off work coming home and going to the grocery store engine hot ac off came up and after finally starting temp gage stayed on c but my fans came on and kept on goi...

    2008 Chevrolet Impala SS FWD

    -

    Maintenance & Repair

  • turn off a/c engine hot warning, analog gauge says cold what is causing this? 1 Answer

    Engine hot turn off A/C-digital warning temp gauge at zero or bottomed out at cold, running fine?

    2008 Chevrolet Impala LS FWD

    -

    Maintenance & Repair

  • ENGINE HOT AC OFF 37 Answers

    My 2009 chevy impala has the code engine hot ac off and went to change out the temperature coolant system ... still nothing ... when the car comes on the fans are at a high speed the temperature o...

    2009 Chevrolet Impala LS FWD

    -

    Maintenance & Repair

  • Car computer read engine hot/ac off 1 Answer

    I have a 2011 Chevy impala. I noticed I had the code come on saying engine hot ac off. I opened the radiator cap noticed a reddish sludge build up in it. What are some things I can do to get rid of...

    2011 Chevrolet Impala LT FWD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Impala Questions

CarGurus Experts

  • #1
    Rowefast
    Reputation
    6,120
  • #2
    james sparrow
    Reputation
    4,630
  • #3
    dandyoun
    Reputation
    4,080
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Malibu
55 Great Deals out of 1,076 listings starting at $1,995
Used Dodge Charger
38 Great Deals out of 896 listings starting at $4,888
Used Honda Accord
48 Great Deals out of 985 listings starting at $2,995
Used Toyota Camry
46 Great Deals out of 1,134 listings starting at $2,500
Used Chevrolet Camaro
15 Great Deals out of 467 listings starting at $10,995
Used Chrysler 300
28 Great Deals out of 530 listings starting at $6,995
Used Chevrolet Silverado 1500
193 Great Deals out of 7,824 listings starting at $7,777
Used Dodge Challenger
31 Great Deals out of 779 listings starting at $11,480
Used Chevrolet Tahoe
13 Great Deals out of 802 listings starting at $9,980
Used Buick LaCrosse
4 Great Deals out of 26 listings starting at $9,995
Used Nissan Altima
34 Great Deals out of 673 listings starting at $3,795
Used Jeep Grand Cherokee
137 Great Deals out of 3,706 listings starting at $4,295
Used Nissan Maxima
13 Great Deals out of 198 listings starting at $1,450
Used Ford Fusion
19 Great Deals out of 449 listings starting at $3,488

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.