Thread: P0128 Issues
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Old 12-08-2011, 11:59 PM   #2
AleroB888
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Quote:
Originally Posted by 20alero02 View Post
Hey all, Haven't been around the site recently (College has been a handful) anyways, as i was on my way to get m car inspected wouldn't you know my check engine light pops on. I scanned the code and it turns out to be p0128 coolant temperature below thermostat regulating temperature. I talked to a few papers and came to the conclusion that the thermostat must have been stuck open. Bought one, installed it, changed the coolant and cleared the code. Less than five miles down the road it came back on again same code. Any ideas? I tried using the search to no avail. Any help is really appreciated i need to get this thing inspected.

So your dash temperature gauge is reading in the correct range?
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