2006 Pontiac G6 Please Help! - Pressure Control out w/no co

Tiny
FLIPPERDAN
  • MEMBER
  • 2006 PONTIAC G6
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 83,000 MILES
My 2006 Pontiac G6 is intermittently shifting very hard between gears and between Park, reverse, and drive! It seems to be getting more common and is very prominent. My mechanic and I were able to hook it up to the computer while the issue was occurring and found that the Pressure Control Solenoid was not registering at all! When tested while not shifting hard it tested completely normal. The only code that is showing up is a Mass Air Flow Sensor code. No transmission code. This is veeeery annoying and can't be good for the longevity of the tranny. The fluid is clean and shfits perfect when not acting up. The check engine light comes and goes. Please Help!
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Wednesday, March 3rd, 2010 AT 12:07 AM

3 Replies

Tiny
BASSTECH
  • MEMBER
They do have problems with the pressure control soleniods, I do a lot of them for that reason. But they usually set a p1811 code.
If your getting a mass air flow code, I'd look into that also.
But I'd consider changing the PC soleniod.
Let me know how you make out.
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Wednesday, March 3rd, 2010 AT 2:45 PM
Tiny
FLIPPERDAN
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Would you recommend checking the harness or any wiring before changing the PC? I read a bulletin about the wiring harness going bad and causing the same issues. In both cases however I read that it would throw a code. Any ideas as to what could cause this and not throw a code or why it would not throw one? Also, is it possible that the MAF code could be caused by the lack of controlled pressure, or vice versa?
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Wednesday, March 3rd, 2010 AT 8:16 PM
Tiny
BASSTECH
  • MEMBER
I see the bulletin that you are talking about but it also states that you should have a code(s) p0742, p2761, p2764. The symptons are similar. But with any transmission repair, once you get it out and apart you always want to look at as much as you can while you have it down in front of you. All the harnesses and connectors, metal debris, etc. Because you don't want to take it apart twice.
So yes, I would check the harness, but I'd more than likely put a PCC soleniod in it also as I have it apart.

The MAF can give you a lot of driveabilty issues, but for it to give you a trans problem the engine would have to be running bad makeing the hard shifts or be an electrical problem on the circut that goes to the MAF and the trans.

Hope all this helps. Let me know how you make out.
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Thursday, March 4th, 2010 AT 6:29 AM

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