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2012 A6 Coolant Temperature Too High!

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Old 05-13-2014, 05:41 PM
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Default 2012 A6 Coolant Temperature Too High!

Hi
I have a 2012 A6 Prestige with 62k on it. After about 20 minutes of driving or less depending on outside temp and ac usage, the car over heats and I receive "coolant temperature too high" as a message. I of course turn the car off and let it sit and cool down. I took the car to get serviced and was told there was an air pocket in the coolant system which they say was low. I drove the car for another 20 minutes or less and received the same issue. Has anyone ever had this issue before? I don't see any leaks or signs of water, the engine doesn't even seem to be really hot. I'm wondering if it may be a sensor error, or is it really that the water pump and thermostat need changed. Any help would be greatly appreciated. Thanks so much....
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Old 05-13-2014, 06:00 PM
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Lots of thermostat failures. Some water pump failures as well.
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Old 05-13-2014, 06:12 PM
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Originally Posted by casmith View Post
Hi
I have a 2012 A6 Prestige with 62k on it. After about 20 minutes of driving or less depending on outside temp and ac usage, the car over heats and I receive "coolant temperature too high" as a message. I of course turn the car off and let it sit and cool down. I took the car to get serviced and was told there was an air pocket in the coolant system which they say was low. I drove the car for another 20 minutes or less and received the same issue. Has anyone ever had this issue before? I don't see any leaks or signs of water, the engine doesn't even seem to be really hot. I'm wondering if it may be a sensor error, or is it really that the water pump and thermostat need changed. Any help would be greatly appreciated. Thanks so much....
This is the C5 forum have you tried the C6 forums?, although I do agree that CTS sensors do fail.
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Old 05-13-2014, 06:21 PM
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Originally Posted by jcman View Post
This is the C5 forum have you tried the C6 forums?, although I do agree that CTS sensors do fail.
The 2012 A6 is a C7 platform. There have been several reported thermostat failures with the 3.0L TFSI engine. Some shops replace the water pump too.

https://www.audiworld.com/forums/sho....php?t=2858298

Last edited by tenspeed; 05-13-2014 at 06:25 PM.
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Old 05-13-2014, 06:59 PM
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Originally Posted by mjfloyd1 View Post
Lots of thermostat failures. Some water pump failures as well.
Thank you so much, I appreciate it.
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Old 05-13-2014, 07:01 PM
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Thank you so much, I am VERY new to this. I'm just desperate for help. I appreciate your assistance.
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Old 05-14-2014, 05:51 PM
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Originally Posted by tenspeed View Post
The 2012 A6 is a C7 platform. There have been several reported thermostat failures with the 3.0L TFSI engine. Some shops replace the water pump too.

https://www.audiworld.com/forums/sho....php?t=2858298
Very informative indeed, but this is the C5 forum.
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Old 05-15-2014, 04:55 AM
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Originally Posted by mjfloyd1 View Post
Lots of thermostat failures. Some water pump failures as well.
Agreed. It's more likely a thermostat failed closed. If I were king all thermostats would fail open…at least you could drive the car. Unsane audi engineers.
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Old 05-15-2014, 04:56 AM
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Originally Posted by mjfloyd1 View Post
Lots of thermostat failures. Some water pump failures as well.
Probably end up pulling the w/p anyway to get to the thermostat..investigate w/p at that time.
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Old 05-16-2014, 10:44 AM
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Make sure the secondary coolant fan is working, too. Mine did this only when I turned the A/C on, turns out the electric fan had croaked.
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