2008 GMC ACADIA P0634 AND B2AAA

  • Tiny
  • npslitt
  • 2008 GMC Acadia

Electrical problem
2008 GMC Acadia 6 cyl Front Wheel Drive Automatic 20000 miles

Respected gentlemen,
i am satisfied with your last suggestions, please help me again

i was going to bakersfield my car showed two codes
P0634 PCM/ECM/TCM Internal Temp Too High
and B2AAA
though after once erased they did not come again.
can you please explain me qand tell me how serious they are and hoiw I can get them fixed ecnomicaly

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Monday, September 28th, 2009 AT 11:31 PM

3 Replies

  • Tiny
  • brian 1
  • Expert
  • 1,071 posts

P0634 is Transmission Control Module (TCM) Overtemperature. The control solenoid (w/body and TCM) valve assembly has a built-in TCM temperature sensor to detect possible overtemperature conditions of the TCM. This fault indicates the TCM is in an overtemperature condition and the TCM has shut down to protect from possible heat damage to the TCM. The TCM will remain off until the over temperature condition no longer exists. Perform the Transmission Fluid Check. Perform the Transmission Fluid Cooler Flushing and Flow Test to verify proper transmission oil cooler flow. Inspect the transmission cooling system for the items list below and repair as necessary. If all the items test normal, replace the control solenoid (w/body and TCM) valve assembly:

" Obstructions in the airflow of the radiator or transmission cooler

" Kinked or damaged transmission fluid lines

" Damage to the transmission cooler, the dtc b2aaa does not come up as a valid code. Post back with any other info.

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Tuesday, September 29th, 2009 AT 5:31 PM
  • Tiny
  • npslitt
  • Member

But have driven more than 200 miles it has npt showed up again so please tell me do I need to get checked
regards

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Wednesday, September 30th, 2009 AT 2:20 PM
  • Tiny
  • brian 1
  • Expert
  • 1,071 posts

I would at least get it checked, you can stop at an GMC dealer, this vehicle is still under warrenty.

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Wednesday, September 30th, 2009 AT 5:30 PM

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