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p0128code gmc envoy


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paulrice
User

Nov 20, 2009, 1:11 PM

Post #1 of 4 (3870 views)
p0128code gmc envoy Sign In

ect sensor wwear is it full of antifreeze what does it mean 2003 gmc envoy 6 cylinder 85000 miles


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Nov 20, 2009, 6:27 PM

Post #2 of 4 (3854 views)
Re: p0128code gmc envoy Sign In

LF of block, near alternator. Why are you looking for it? Trouble code?
Loren
SW Washington


paulrice
User

Nov 21, 2009, 8:54 AM

Post #3 of 4 (3846 views)
Re: p0128code gmc envoy Sign In

po128code maybe sensor


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 21, 2009, 9:51 AM

Post #4 of 4 (3842 views)
Re: p0128code gmc envoy Sign In

That's not necessarily a bad sensor. The code means the sensor is reading lower than the engine should be running. That could just as easily be a bad thermostat causing the engine to actually run too cool. You really need a scan tool to see just when temp the PCM is seeing and whether that is the actual temp of the engine. It can also be related wiring causing the problem.



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