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Old 06-27-2012, 03:05 PM   #1
HammerStriker
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High Temperature Warning

A strange / worrisome thing has happened to me three times now, and I wanted to see if anyone else has had the same problem.

My coolant temp spikes, I get a high temp warning, and then the temp drops back to normal. This all happens within a 15 second window. It happened under different driving conditions each time, so I am really confused. I've checked everything, and it all seems normal under the hood.

I did a forum search and it came up with one guy with similar problems, but it had to do with his engine block heater. There’s not much use for those in Houston… 104 the last few days.


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Old 06-27-2012, 05:46 PM   #2
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Im in Houston as well, and haven't had any issues with this heat. Trip to dealer is in order. Have you checked for dtc codes?
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Old 06-27-2012, 06:24 PM   #3
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I'd just run it down to the dealer to have it looked at. I imagine that should leave some kind of code in the system they could see.
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Old 06-27-2012, 06:33 PM   #4
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Bryan, TX here. 104 yesterday. 106 today. No issues.
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Old 06-27-2012, 06:44 PM   #5
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Vegas and death valley and seen temp reading at 114 with no issues
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Old 06-27-2012, 07:43 PM   #6
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The coolant cant physically heat up and cool down in such a short period of time so it sounds like a faulty temp sensor. Should be an easy fix for the dealer.
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Old 06-27-2012, 11:19 PM   #7
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Quote:
Originally Posted by Superd View Post
The coolant cant physically heat up and cool down in such a short period of time so it sounds like a faulty temp sensor. Should be an easy fix for the dealer.
^^^ Most likely.
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Old 06-27-2012, 11:58 PM   #8
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Quote:
Originally Posted by Superd View Post
The coolant cant physically heat up and cool down in such a short period of time so it sounds like a faulty temp sensor. Should be an easy fix for the dealer.
Agreed.

It's better than overheating.
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Old 07-06-2012, 07:55 AM   #9
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Quote:
Originally Posted by Superd View Post
The coolant cant physically heat up and cool down in such a short period of time so it sounds like a faulty temp sensor. Should be an easy fix for the dealer.
When they told me that it was definitely overheating, I brought this up as well. Which is what made them change the temp sensor even though it was testing ok.

I don't think they are taking a true temp reading, and just going off of the car's warning system, but I don't know that for sure. The whole thing seems really weird.
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Old 07-06-2012, 10:30 AM   #10
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Quote:
Originally Posted by HammerStriker View Post
When they told me that it was definitely overheating, I brought this up as well. Which is what made them change the temp sensor even though it was testing ok.

I don't think they are taking a true temp reading, and just going off of the car's warning system, but I don't know that for sure. The whole thing seems really weird.
A bad head gasket can blow combustion pressure into the cooling system and cause intermittent overheating. This seems unlikely on a new engine and would be a worst case scenario.

Also, I not familiar enough with this engine design to know exactly what the symptoms would be on a failing head gasket. I have had the symptoms you described with a bad head gasket on V-6 engines.
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