Hyundai Elantra 2000 Check engine light

Discussion in 'Hyundai Elantra / Lantra' started by mesa, Jul 24, 2005.

  1. mesa

    mesa Guest

    Brought my Elantra to a dealership because my check engine light had
    illuminated. They did a diagnostic and the code P1128 came up, and the
    mass air flow sensor had to be replaced. Even after it was replaced
    and the the code was cleared. The check engine light came back on
    again, P1128 is still coming up, but now code P0130 (02 sensor) is now
    coming up. Could the O2 sensor be the cause of the mass airflow sensor
    malfunctioning? If I take the car in again this will be the 4th time
    they replace the mass air flow sensor. HELP!
     
    mesa, Jul 24, 2005
    #1
  2. mesa

    hyundaitech Guest

    P1128 means that the car thinks the fuel mixture is unexpectedly lean. The
    air flow sensor is one (and the most frequent) cause. A poorly performing
    oxygen sensor could also be a cause. The oxygen sensor won't, however,
    cause the air flow sensor to fail.
     
    hyundaitech, Jul 25, 2005
    #2
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