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2008 Pontiac G6


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Bigdaddy63
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Nov 11, 2011, 9:17 PM

Post #1 of 5 (3167 views)
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2008 Pontiac G6 Sign In

We were driving the car and the temp gauge went to 0. The check engine light came on. We were close to Autozone and pulled in. He put a reader under the dash and it pulled up a P128 code and 1 fault code that he didn't know what that Fault code meant. He said I needed a thermostat and permatex. I wanted to check to see if this is what it might be. We placed coolant in it drove home and it did it again when I went to TSC.
What is a fault code and what is the P128.
I sincerely appreciate any assistance on this!
Thank you,
Bill
Ohio


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 11, 2011, 9:19 PM

Post #2 of 5 (3165 views)
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Re: 2008 Pontiac G6 [In reply to] Sign In

PO128 just means the computer is see a temp signal too low, you still need to find out if it really is and why.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
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Nov 11, 2011, 9:24 PM

Post #3 of 5 (3159 views)
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Re: 2008 Pontiac G6 [In reply to] Sign In

Would be nice to know what the other fault code number is also.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 11, 2011, 9:25 PM)


Bigdaddy63
Novice

Nov 13, 2011, 11:46 AM

Post #4 of 5 (3127 views)
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Re: 2008 Pontiac G6 [In reply to] Sign In

The only other code was a fault code 01/01. When he read the meter that plugged in under the dash, the P0128 goes away and the temp gauge goes to 150 and no higher. The meter reads p0128 and fault 01/01. Does this assist in anyway at all.
My daughter just drove it to work and the temp gauge went back to zero, the temp gauge only goes to 150 & no higher. The coolant is full though and staying that way!!


(This post was edited by Bigdaddy63 on Nov 13, 2011, 11:58 AM)


Hammer Time
Ultimate Carjunky / Moderator
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Nov 13, 2011, 12:38 PM

Post #5 of 5 (3121 views)
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Re: 2008 Pontiac G6 [In reply to] Sign In

That wasn't a code. It just meant you are looking at code one of one total codes.

If you are seeing a 0 temp after the engine has been running, then you have either a bad temp sensor, related wiring or PCM.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





2008 Pontiac G6


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