Fan going on full power after car is shut off

Jordie · 10-02-2021, 06:01 AM

So my car is from 2016 ss manual. Have around 50k miles it has happened 3 times already. First time night was cool and it fix after itself then after 3 months same thing happened and it fixed by itself after 2 days. Now it happened again just after one day that the second time occurred. So the issues is, while I’m driving the engine temperature needle drops all the way to the bottom when it should be around 200, and the rev match deactivate by itself and the ac stop blowing cold air, then if I turn off the car the engine fan keeps going on at full power after I turn the car off for at least 5 minutes. Any recommendations as to what might be causing this. Just letting you guys know this hasn’t happened in hot days or hours. If I take it to the dealer what should I spect. Thanks guys.

LiqTenExp · 10-02-2021, 09:03 AM

Look at MAF connector and MAF sensor. If the temperature signal from there is lost this can occur.

S.Macias · 10-02-2021, 10:18 AM

Same issue. Turned out to be the thermostat. Had it replaced and hasn't happened since.

Here in Monterey, CA dealer charged about $500 to replace. Might be cheaper in Florida.

Spaceme1117 · 10-02-2021, 11:10 AM

This happened to my car after I added a Rotofab intake. Turned out that the clamps that came with the kit were not sealing the intake connections very well. Upgraded the clamps and no problems anymore.

Yang N’ Bang · 10-02-2021, 12:18 PM

Had this same issue a month or so ago, turned out to be the coolant temp sensor.

Warrior102 · 10-02-2021, 03:56 PM

Quote:

Originally Posted by Yang N’ Bang

Had this same issue a month or so ago, turned out to be the coolant temp sensor.

This is the most likely problem.

TCCamaro · 10-03-2021, 12:10 AM

I had this exact same issue on my 2016 Camaro, I ended up disconnecting the battery in the trunk, letting the car sit for 10 minutes, reconnecting it, and never had an issue again, it was a one time thing, I would try this first before buying and replacing a thermostat

Bumbleboy92 · 10-03-2021, 12:35 AM

Try the battery disconnect but if it comes back then replace the thermostat. Then the coolant sensor.

So many of these cars had the same issue early years. I still have the issue, originally only wanted to change coolant sensor but on the v6 it’s very difficult to reach. Bought a thermostat as well so I’ll replace both when I actually tear the IM off again

wal-dog · 10-05-2021, 09:43 AM

I did coolant temp sensor first. Didn't fix. Did thermostat next and now it is fixed. I would just do both at the same time.

10-02-2021, 06:01 AM	#1
Jordie Drives: 2016 ss manmission Join Date: Apr 2018 Location: Fl Posts: 16	Fan going on full power after car is shut off So my car is from 2016 ss manual. Have around 50k miles it has happened 3 times already. First time night was cool and it fix after itself then after 3 months same thing happened and it fixed by itself after 2 days. Now it happened again just after one day that the second time occurred. So the issues is, while I’m driving the engine temperature needle drops all the way to the bottom when it should be around 200, and the rev match deactivate by itself and the ac stop blowing cold air, then if I turn off the car the engine fan keeps going on at full power after I turn the car off for at least 5 minutes. Any recommendations as to what might be causing this. Just letting you guys know this hasn’t happened in hot days or hours. If I take it to the dealer what should I spect. Thanks guys.

10-02-2021, 09:03 AM	#2
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	Look at MAF connector and MAF sensor. If the temperature signal from there is lost this can occur. __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)

10-02-2021, 10:18 AM	#3
S.Macias Monterey County Camaros Drives: 2016 Camaro Join Date: Nov 2019 Location: California Posts: 384 View My Garage	Same issue. Turned out to be the thermostat. Had it replaced and hasn't happened since. Here in Monterey, CA dealer charged about $500 to replace. Might be cheaper in Florida. __________________ Follow us on Instagram @montereycountycamaros

10-03-2021, 12:35 AM	#8
Bumbleboy92 Long hauler Drives: 2022 Camaro 2SS 1LE Join Date: Mar 2017 Location: Houston, TX Posts: 1,616 View My Garage	Try the battery disconnect but if it comes back then replace the thermostat. Then the coolant sensor. So many of these cars had the same issue early years. I still have the issue, originally only wanted to change coolant sensor but on the v6 it’s very difficult to reach. Bought a thermostat as well so I’ll replace both when I actually tear the IM off again __________________ 2022 2SS 1LE - Cold Air Inductions Elite Carbon CAI 2016 1LT v6 - Totaled Happiness: Infinite

10-02-2021, 11:10 AM	#4
Spaceme1117 Drives: 2017 Camaro SS, 2011 Corvette GS Join Date: Feb 2019 Location: Erlanger, Kentucky 41018 Posts: 815	This happened to my car after I added a Rotofab intake. Turned out that the clamps that came with the kit were not sealing the intake connections very well. Upgraded the clamps and no problems anymore.

10-02-2021, 12:18 PM	#5
Yang N’ Bang 17’ Hyper Blue 2SS Drives: 17’ Camaro 2SS Join Date: Nov 2018 Location: Phoenix Arizona Posts: 225 View My Garage	Had this same issue a month or so ago, turned out to be the coolant temp sensor.

10-03-2021, 12:10 AM	#7
TCCamaro Drives: 2016 Camaro 1LT RS V6 Join Date: May 2020 Location: Michigan Posts: 94	I had this exact same issue on my 2016 Camaro, I ended up disconnecting the battery in the trunk, letting the car sit for 10 minutes, reconnecting it, and never had an issue again, it was a one time thing, I would try this first before buying and replacing a thermostat

10-05-2021, 09:43 AM	#9
wal-dog Drives: 2016 Garnet Red 1SS Join Date: Feb 2011 Location: Tucson Posts: 208	I did coolant temp sensor first. Didn't fix. Did thermostat next and now it is fixed. I would just do both at the same time.

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