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p0128

  1. General
    During the cooler months I got a code that basically said the engine should have warmed up by now. I replaced the thermostat housing. They really thought about mechanics when they picked this location. Anyway, it seemed fine. Maybe psychological, but it did seem like that was the fix. Now the...
  2. OEM Issues
    Lately my '06 I6 (95K miles) has been regularly throwing a P0128, and it does seem to be running a bit cooler than normal, so I need a new thermostat. I know these forums are full of great how-tos, but I'll probably just pay a pro eventually. My question is, do I really care about this right...
  3. OEM Issues
    Hi All, I am new to the forum and I am making my very first post! I have a 2008 GMC Envoy with the 4.2L I6 engine. I recently began noticing my temperature gauge intemittently not working. Some days it would display the correct temperature and then some days nothing. Then last week I got a check...
  4. OEM Issues
    Im going to replace the thermostat (code p0128) and I had a few questions about the parts. The stant thermostat #14659 says 187º on the website and Amazon says 190º. Are these operating temperatures or the temp at which it opens up? I know the truck's correct operating temp is 210º. Would you...
  5. General
    Just purchased a 2006 Envoy 4.2 - 119K. Threw a P0128 code and had it reset and I've found lots of information (t-stat) on the code. I've got a couple of questions: 1 - What is the optimal temperature that I should look for? Right now it's showing a hash-mark or 2 short of 210 degrees F. Is...
  6. General
    I've been getting a service engine light along with a reduced engine power that will not alow the truck to accelerate. After a restart the service engine light will stay on but reduced engine power is not triggered and will allow me to continue to drive until triggered again. I went to autozone...
  7. Introductions
    Hi. My name is MBird and I'm a girl in Michigan who owns a 2004 Trailblazer with an inline 6 contrary to my description above my car ooops ! how do i correct that?
  8. OEM Issues
    Coming home from Carlisle my temp gauge was much lower then normal. It happened 2 more times throughout last week. No SES. Got bored and went looking for one trip faults. The freeze frame was similar to this, long run time barely 180. Not a bad job. Didn't mess with extensions through...
  9. OEM Issues
    About a month ago, my TB had a dead battery, so I got it recharged. It then happened 2 more times. Finally, I bought a new battery. Don't know if it relates but, after that, I started getting the dreaded Reduced Engine Power Light along with the SES. Took it to Autozone and got code p1271 along...
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