Recent content by Jmix91

  1. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    No the code reads high voltage. Lo Low voltage is below .4 volts High voltage is above 4 volts I know it’s weird and very confusing.
  2. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    The scanner reads below 4 volts
  3. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    That might be my problem. I’ll feel more comfortable once I get rid of the new CEL P0193. I had replaced the fuel pressure sensor like I said before and then “fixed” the stalling problem now I have a P0193
  4. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    Well the FPCM didn’t have power after stalling so I chased that power wire (which is a straight shot to the fuse box). So far come to find out the fuse box wasnt seated all the way down. ‍smh. So it’s running right now just waiting to see a difference
  5. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    I have a Z71. My høe does not have ESC.
  6. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    I feel like I’m studying to be a master technician ‍
  7. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    You’re on the right path lol. I notice the FPCM connector did not have power once she stalled. Now I have to find the break in the wire
  8. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    I just replaced the fuel pressure sensor yesterday and same results
  9. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    Seems like GM techs do not know neither. They said the fuel pump is causing the FPCM to overheat and shut off causing the loss communication. However I just warranty the fuel pump and boom same problem
  10. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    Yeah imma have to just bite the bullet and take it to the dealer
  11. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

  12. Jmix91

    Is there any certified GM techs in the group? U0109 is driving me insane.

    2009 Tahoe 5.3L DLC - P0506 & U0109 Repairs and actions so far. - replaced FPCM 3x - PROGRAMMED 4x (last 2 times at Chevy dealership) - replaced fuel pump - replaced throttle body - replaced EVAP purge valve - replaced EVAP vent canister - replaced FPCM Connector - cleaned both bell housing...
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