DTC P0128
#1
DTC P0128
Searched the forum and couldn't find an answer to this one. My 2007 Silverado 4wd 4.3 v6 threw a DTC today- P0128- Coolant Temp Below Thermostat Regulating Temp. Outside temp was about 55 degrees, and the engine coolant temp gauge showed the temp at about 185 where it usually reads. Heater was working okay. I'm guessing there is a sensor somewhere to go bad? Is this something I can drive with until Monday? Thanks.
#6
p0128
I got the same code man...I've been looking for the problem solve for couple days. What did you do to fix your truck from that code poping up again? did you finally just replace T-stat??
Please reply with sum helpful hints. Thank you all for the help!
Please reply with sum helpful hints. Thank you all for the help!
#7
Take your T stat off, get a boiling pot, a candy thermometer, put the T stat in the pot, add some water and turn up the heat. When a T stat is marked 195, it means it should close at 195, not open. So therefore it should open at about 205. Then shut off the heat and let the temp go down to see what it closes at. This is an easy test to rule out a bad T stat.
#8
Thanx man
okay budd..ill try that ..thanks alot ..you know its weird..My check engine light was off today when i climbed into the truck..started it..it was off...i live in South Carolina so it doesn't get to cold here. but ...It hasn't come back on yet so..I dunno what caused it to show up then DISSAPPEAR!!! ..wth..I dunno man some kinda freak of nature truck....ever heard of somthing like that?? also my temp of my truck doesn't climb pass 185. thats it..it stops no matter how long i have it running or how long i use it..it doesn't go passed...so I have no CLUUE!
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10-04-2010 06:57 PM