2003 CTS MAF Sensor Problems

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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 2003 CTS MAF Sensor Problems in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hello, I recently came up with an error code (p0102C) -Mass Air Flow Sensor Circuit Low Frequency. I ordered the ...
  1. #1
    RobertMcc is offline Cadillac Owners Member
    Automobile(s): 2003 Cadillac CTS
    Join Date
    Apr 2012
    Lake Charles, La

    2003 CTS MAF Sensor Problems

    Hello, I recently came up with an error code (p0102C) -Mass Air Flow Sensor Circuit Low Frequency. I ordered the new MAF sensor from autozone and replaced it, but the car is still running like garbage; slow acceleration, rough idle, sluggish response. I've replaced the crankshaft position sensor, spark plugs (no misfires) and air filter.I'm still getting the p0102C error, any ideas on what to do? Why is it still saying low freq on the maf circuit? Thanks

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  3. #2
    CTSUK's Avatar
    CTSUK is offline Cadillac Owners Enthusiast
    Automobile(s): 2005 Cadillac CTS 3.6 Sport Luxury
    Join Date
    May 2012
    United Kingdom

    Re: 2003 CTS MAF Sensor Problems


    Could be that you have an air leak somewhere, check all piping, I have had a pipe pop off close to the throttle body tunnel before, surprisingly this didn't bring up any codes though.
    Also worth checking the wiring to the sensor make sure its not damaged at all.

    Seems like the 2003 guys are having a bit of a rough deal with ECM failure of late.

  4. #3
    Kik is offline Cadillac Owners Member
    Automobile(s): CTS
    Join Date
    Jul 2012

    Re: 2003 CTS MAF Sensor Problems

    What you're describing sounds like either having a problem with your IAC as CTSUK stated an air problem.Ifit's an air problem I would look at the intake manifold gasket first. I believe these are rubber and plastic gaskets. I know chevy guys that have had a heck of time with these going bad.

  5. #4
    jran0823's Avatar
    jran0823 is offline Cadillac Owners Connoisseur
    Automobile(s): 2003 CTS 1SC Luxury Sport
    Join Date
    Apr 2011
    GB, WI
    When you have an electronic throttle body you don't have IAC. Computer controls the idle with the throttle body instead. Might have a throttle body issue.

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