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  1. #1

    Default Reduced engine power

    i have a 06 vortec max, and the check engine of death came on and "reduced engine power" shows up, so i ran my decoder and came up with the code for the MAP sensor. so i change it, check engine went away and drove 100% after that for about 4 weeks. well one morning i went out when it was -30 and started it (was plugged in all night) and the check engine light came back on and "reduced engine power" came back on. so i ran my decoder again and same code came up. then i shut the truck off. let it sit for a few min. started it back up normal and away she went...... BUT the ABS and the emergancy break light came on and "service break system" came on the display. so i let it warm up. drove to work. then shut it off. let sit for a few mins then started it back up and everything was normal. any thoughts???

  2. #2
    Master Mechanic TritonBoulder47's Avatar
    Join Date
    Nov 2009
    Tunkhannock, PA (North East)


    The extreme cold might be throwing codes because the sensors are getting frozen... But that's just my thought process...

    Tim a.k.a. Da' Boulder

    2003 Chevrolet Avalanche Z71 - Custom Emergency Response POV

    Firefighter, Fire Policeman, Ambulance Driver, Rescue Tech, Emergency Lighting Installer

    Tint, 20's, Bull Bar, Intake, Exhaust, Billet Grill, Stereo, Custom Console, Emergency Equipment, and the list goes on...

  3. #3
    Jr. Apprentice
    Join Date
    Mar 2008
    mid coast maine


    my 07 NBS 5.3 has been doing the same thing only the code in getting is for the pedals, first the dealership found a loose ground, and it was fixed for 3 months and now its doing it again, and now they said it was a corroded connector. i dnt know if this helps.

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