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  1. #1

    Question Will a bad mass air flow sensor throw a code???

    Will a bad mass air flow sensor throw a check engine code? some say yes some say no? Anyone on here Know the answer?
    2004 Chevy Silverado all blacked out, fresh paint and interior done by myself at KuttingEdgeInteriors...

  2. #2


    I had that problem on mine and i checked the codes which told me i had a bad mass airflow sensor, so i changed it and the code went away.

    Grand Prairie, TX
    2003 Silverado LS
    4.8 V8
    Helix Power Tower Throttle Body Spacer
    Cherrybomb Extreme single 3 in/dual 2.5 out dumped
    8000k HIDs
    3.73 gears
    BFG Long Trail T/A's

  3. #3

    Join Date
    Feb 2008
    Red Wing, Minnesota, United States


    you should, you also may get some others as the computer will have a hard time keeping fuel to air ratio steady, so you could get misfires as well.
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual

  4. #4


    that was exactly what happened with mine. i got too lean and random/ multiple cylinder misfires as well. but once i changed the maf and started usin better gas it cleared right up

  5. #5
    Sr. Engineer
    Join Date
    Jun 2009
    San Diego, CA


    Most definitely! Clean it or change it out ASAP. If you have to change it out, don't bother with an aftermarket brand, stick with the OEM.
    Black Bear Performance- Custom Tuning Solutions

    Authorized EFILive and MAGNACHARGER seller

  6. #6


    Thanks for the help! Everyone I have been talking to has been giving me the run around, some saying yes it def... will and some saying no it won't... I did try another maf in my truck today and it still ran like sh!* so I have no idea whats wrong with my truck it is not throwing an engine light or any codes

    guess its goin to the shop tomorrow

  7. #7
    Sr. Engineer
    Join Date
    Jun 2009
    San Diego, CA


    Did you clean the throttle body?

  8. #8


    Quote Originally Posted by JennaBear View Post
    Did you clean the throttle body?

    Yes I cleaned the throttle body and the maf? I'm not sure, I'm thinking maybe it is a cam position sensor or something who knows? Its just going to the shop!

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