Need help, coolant temp gauge not working

Clin5910 · 07-29-2018, 11:09 AM

So as the title says the coolant temp gauge randomly stopped working today and the fan will run full blast. Car runs fine with no cel. Ideas?

Clin5910 · 07-29-2018, 04:08 PM

I’m thinking it’s the coolant temp sensor. Still blows hot air in the car so I do t think it’s the thermostat. Can’t get a part till at least tomorrow as the parts stores near me are all closed, so I’ll find out for sure when I get a new sensor and see if that does the trick.
Any other ideas on what it could be?

HighIron · 07-29-2018, 04:35 PM

Off the top of my head I'd say the sensor too, since the PCM "sees" an erroneous coolant temp parameter input and runs the fans as a fail-safe.

If it were your dash indicator you wouldn't get a reading but as far as the PCM was concerned, everything is fine....unless, that parameter input is a direct function of the gauge itself...but I doubt that.

avalonandl · 07-30-2018, 12:04 PM

Warranty?

ctrlz · 07-30-2018, 02:04 PM

Hook up a scan tool that lets you read different sensors. Coolant temp is pretty basic.
I agree with others, that it is likely a sensor failure. These are typically $10 parts. getting access to replace it may be the bigger problem. This is definitely covered by warranty.

Jeb114 · 07-30-2018, 03:50 PM

warranty.

Clin5910 · 07-30-2018, 05:28 PM

Sorry guys but I probably should’ve mentioned that I’ve been running a whipple for the past two weeks after getting it tuned by a reputable shop. Had no problems since I got the tune dialed in up to now. Replaced the sensor and am about to take it for a drive and see if the problem clears up.
Ps the sensor was a pita to change without removing the air box

Clin5910 · 07-30-2018, 06:33 PM

So just did a little drive around the block after changing the sensor but same thing is still going on. Unless it’s the connector and not the sensor I’m not sure what else could be causing this. I checked the wires and they look in good shape.
Anyways I’ve contacted my tuner and I’ll see what he has to say but any help would be greatly appreciated.

Sledgehammer70 · 07-31-2018, 01:32 PM

Small known fact, not one of the coolant gauges in our cars seem to work properly. They never read the actual temps.

ctrlz · 07-31-2018, 05:37 PM

Quote:

Originally Posted by Clin5910

Sorry guys but I probably should’ve mentioned that I’ve been running a whipple for the past two weeks after getting it tuned by a reputable shop.

I would check with tuner to make sure ECM flash was done correctly. These units change the fan parameters to come on at higher speed earlier. You also get a new thermostat with the installation kit.

Randall08 · 10-10-2018, 05:15 PM

Did you ever figure out the issue. I’m having the same problem

SPreston2001 · 03-27-2019, 03:14 PM

Mines is having this SAME exact problem. Fan runs on FULL BLAST sounds like a fighter jet and the temp gauge doesn't move (stays at 160). Took it to the dealership, bingo temp sensor was shot. Confirmed by the tech the car runs the fans full blast to protect against overheating since the car cant read the temp.

KelvinnDC · 05-14-2019, 12:12 PM

Anyone figure out the issue??

TatsuSensei · 10-29-2019, 04:27 PM

Just had to order a coolant sensor as noone in Georgia has it in stock. Will replace and hopefully it will be this simple. Same symptoms. No reading and full blast fans.

07-29-2018, 11:09 AM	#1
Clin5910 Drives: 2016 2ss, whipple supercharged Join Date: Apr 2016 Location: Ontario, Canada Posts: 76	Need help, coolant temp gauge not working So as the title says the coolant temp gauge randomly stopped working today and the fan will run full blast. Car runs fine with no cel. Ideas?

07-30-2018, 12:04 PM	#4
avalonandl Drives: 2019 ZL-1 Join Date: Feb 2009 Location: Troy, MI & Naples, FL Posts: 2,019	Warranty? __________________ 2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles... 2012 Yukon XL Denali w/ 6.2 AWD

07-31-2018, 01:32 PM	#9
Sledgehammer70 Lethal Camaro Drives: 16 2SS, 71 Std, Suburban RTS Join Date: Jun 2013 Location: Temecula, CA Posts: 3,855 View My Garage	Small known fact, not one of the coolant gauges in our cars seem to work properly. They never read the actual temps. __________________ Thanks My Build Thread \| Lethal Garage YouTube \| Lethal Camaro IG \|

03-27-2019, 03:14 PM	#12
SPreston2001 Drives: 2017 Camaro 1SS Join Date: Jan 2019 Location: Columbus, OH Posts: 20	Mines is having this SAME exact problem. Fan runs on FULL BLAST sounds like a fighter jet and the temp gauge doesn't move (stays at 160). Took it to the dealership, bingo temp sensor was shot. Confirmed by the tech the car runs the fans full blast to protect against overheating since the car cant read the temp. __________________ 2017 Camaro SS, Garnet Red, 20” Bronze Chrome MMR ZL1 Reps

07-29-2018, 04:08 PM	#2
Clin5910 Drives: 2016 2ss, whipple supercharged Join Date: Apr 2016 Location: Ontario, Canada Posts: 76	I’m thinking it’s the coolant temp sensor. Still blows hot air in the car so I do t think it’s the thermostat. Can’t get a part till at least tomorrow as the parts stores near me are all closed, so I’ll find out for sure when I get a new sensor and see if that does the trick. Any other ideas on what it could be?

07-29-2018, 04:35 PM	#3
HighIron Drives: 2024 2SS Summit White Join Date: Jun 2018 Location: US Posts: 149	Off the top of my head I'd say the sensor too, since the PCM "sees" an erroneous coolant temp parameter input and runs the fans as a fail-safe. If it were your dash indicator you wouldn't get a reading but as far as the PCM was concerned, everything is fine....unless, that parameter input is a direct function of the gauge itself...but I doubt that.

07-30-2018, 02:04 PM	#5
ctrlz Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016 Location: Ocean City, NJ Posts: 3,181	Hook up a scan tool that lets you read different sensors. Coolant temp is pretty basic. I agree with others, that it is likely a sensor failure. These are typically $10 parts. getting access to replace it may be the bigger problem. This is definitely covered by warranty.

07-30-2018, 03:50 PM	#6
Jeb114 Drives: 2021 300 Join Date: Jan 2015 Location: New Jersey Posts: 968	warranty.

07-30-2018, 05:28 PM	#7
Clin5910 Drives: 2016 2ss, whipple supercharged Join Date: Apr 2016 Location: Ontario, Canada Posts: 76	Sorry guys but I probably should’ve mentioned that I’ve been running a whipple for the past two weeks after getting it tuned by a reputable shop. Had no problems since I got the tune dialed in up to now. Replaced the sensor and am about to take it for a drive and see if the problem clears up. Ps the sensor was a pita to change without removing the air box

07-30-2018, 06:33 PM	#8
Clin5910 Drives: 2016 2ss, whipple supercharged Join Date: Apr 2016 Location: Ontario, Canada Posts: 76	So just did a little drive around the block after changing the sensor but same thing is still going on. Unless it’s the connector and not the sensor I’m not sure what else could be causing this. I checked the wires and they look in good shape. Anyways I’ve contacted my tuner and I’ll see what he has to say but any help would be greatly appreciated.

10-10-2018, 05:15 PM	#11
Randall08 Drives: 2016 Camaro RS Join Date: Sep 2016 Location: Fort Worth texas Posts: 52	Did you ever figure out the issue. I’m having the same problem

05-14-2019, 12:12 PM	#13
KelvinnDC Drives: 2016 V6 Summit White/Adrenaline Red Join Date: May 2016 Location: Maryland Posts: 70	Anyone figure out the issue??

10-29-2019, 04:27 PM	#14
TatsuSensei Drives: 2016 RS Hyper Blue Join Date: Jul 2016 Location: Warner Robins, GA Posts: 47	Just had to order a coolant sensor as noone in Georgia has it in stock. Will replace and hopefully it will be this simple. Same symptoms. No reading and full blast fans.

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