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Thread: Needs Help truck given reduce power

  1. #1
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
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    174

    Needs Help truck given reduce power

    Need to know what is up with these error codes need to know if to fix clear codes starts working then 10 mins of driving around there again with the codes
    P1120 throttle position sensor A out of range low rachet
    p1515 electric current circuit
    p1221 traction control system
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  2. #2
    Join Date
    Aug 2008
    Location
    North Texas
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    12,078
    Give me a couple hours and I'll respond with a better answer than this...gotta get baths and flossing and brushing and potty done for the troika of little ones done as well as going out for Chili's Friday night!

  3. #3
    Join Date
    Jan 2009
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    Las Cruces, NM
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    174
    help!
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  4. #4
    Join Date
    Mar 2003
    Location
    San Antonio, TX
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    11,038
    Can you try a different TAC module?

    The 1515 is way i'm asking, I've seen it before.

  5. #5
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
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    i would not be able to. How much are they maybe i can get one if cheap enough or if its going to fix it i would need one. what about the other codes?
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  6. #6
    Join Date
    Aug 2008
    Location
    North Texas
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    Sorry I forgot. Bump the topic again and I'll try to help tonight or tomorrow.

  7. #7
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
    Posts
    174
    bump
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  8. #8
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Have the battery tested. When one is going out or starts the engine with a low charge the TACM and PCM wake up at slightly different times and they can set these codes. Also check the ground on the back of the passenger side of the block next to the oil pressure sensor. Also check for wires to the throttle body broken inside the insulation within a few inches of the connector. Pull on each wire one at a time and look for the insulation to turn white where it stretches. The copper strands break without the insulation breaking.

  9. #9
    Join Date
    Sep 2007
    Location
    Monroe,Louisiana
    Posts
    194
    I hope you figure it out, Mines been in reduced engine power since febuary and still down.
    2003 RCSS Chevy 5.3L Fully Bolted, Cammed, Yanked, and 342s. Borla Exhaust w/ Electric Cutouts.

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