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My temperature gauge reads 0 all the time and it says engine…

Customer Question
My temperature gauge reads...

My temperature gauge reads 0 all the time and it says engine hot ac off as soon as i start the car 2008 cts

Mechanic's Assistant: Have you checked the coolant? Have you noticed any leaking?

No leak runs and drives for long periods of time fine

Mechanic's Assistant: Are you fixing your CTS yourself? What have you tried so far?

Havent tried anything, it is intermittent

Submitted: 7 months ago.Category: Cadillac
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Answered in 5 minutes by:
11/8/2017
Cadillac Mechanic: Dan, Technician replied 7 months ago
Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 25,964
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Hello, my name is ***** ***** I'm here to help get your problem solved.

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Customer reply replied 7 months ago
hows it going dan
Cadillac Mechanic: Dan, Technician replied 7 months ago

It is going well, thanks for asking. This usually means coolant temp sensor or thermostat has failed, when computer notices a problem it puts vehicle in safe mode by saying it is hot and disabling the temperature gauge. I would recommend replacing both parts, make sure to use AC Delco brand thermostat. To have this done at a shop you are looking at around $400 or $60 to do it yourself. Let me know if you have questions, thanks.

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Customer reply replied 7 months ago
okay i thought it might be the temp gauge because it is always reading 0, but it is intermittent sometimes it goes away, no engine light though, will it pass etest like that?
Customer reply replied 7 months ago
i will replace the temp gauge and thermostat, is the temp gauge a hard job, and the thermostat, is it hard to get to on the 3.6?
Cadillac Mechanic: Dan, Technician replied 7 months ago

No it won't pass emission test with any check engine light on as far as I know so problem will need to be fixed. They are both pretty easy give me a few minutes and I'll upload procedure.

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Cadillac Mechanic: Dan, Technician replied 7 months ago

Here are replacement instructions, let me know if you have questions or run into questions. You can reply to this answer at any time without additional fees, please do not forget to rate answer. Thanks.

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https://www.dropbox.com/s/shieqdmne7a76t6/cts1.pdf?dl=0

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https://www.dropbox.com/s/lt2sil3sh3ssooo/cts2.pdf?dl=0

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Customer reply replied 7 months ago
sounds good buddy thank you
Cadillac Mechanic: Dan, Technician replied 7 months ago

No problem, let me know how it goes. Thanks again and have a good night.

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Cadillac Mechanic: Dan, Technician replied 7 months ago

Ever get it figured out? Please do not forget to rate answer, thanks.

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