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Acadia smoke, high temp, fan won't turn on unless AC is on

Out of the blue yesterday after driving it on and off all day. I turned the vehicle on and after a few seconds white smoke was clouding out of the tailpipes. Temp gauge went quickly to 210....noticed fan in engine comp wasn't coming on either. Turned AC on and the fan came on. If I let it cool and turn it on, everything seems find for a few minutes, then it all happens again. Any ideas?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Thermostat problem? 99 GMC savanna cargo 2500 5.0 liter

jt\\it could be the water pump or the thermostat giving you problems

Posted on Jan 22, 2009

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  • 146 Answers

SOURCE: temp gauge often reads too hot, engine normal.

It sounds like your cooling fans are not comming on by themselves, but when you turn on the ac it forces them to turn on. Make sure relay is good, then replace coolant temp sensor, this may have failed no telling pcm to turn on cooling fans. Thanks

Posted on Jun 08, 2009

  • 65 Answers

SOURCE: 2003 Envoy intermittent display, radio, ac control, shift, comp.

This sounds like your alternator maybe going bad. When your alternator starts to go bad lights such as headlights, radio lights will go dim wipers will start to move slower but if you cut one of the things off such as the wipers the lights will get brighter for a few minutes then not long the car will shut completely down. Hope this helps.

Posted on Jul 24, 2009

emissionwiz
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SOURCE: '08 silverado. dash board diplays, engine running

P0128 OBD-II Trouble Code Technical Description

Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
What does that mean?

This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms

You will likely not notice any drivability problems other than the MIL illumination.


Causes

A code P0128 may mean that one or more of the following has happened:

Possible Solutions

Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:

  • Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat


Posted on Oct 26, 2010

  • 27 Answers

SOURCE: i have a 05 yukon

Could have been an air lock that worked its way out. Did you add any coolant prior to driving? Keep an eye on it, another thought could be your thermostat stuck closed and then opened. Is it normal to run at 200? or 160? Perhaps the weather was extreme which might cause the sudden drop.

Posted on Dec 28, 2010

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