engine running lean – kia forte 2.0 2010

car forum repair & maintenance engine running lean – kia forte 2.0 2010

  • sida
    community member
    november 14, 2021 at 9:17 pm

    i recently bought a kia forte 2010 2.0. 30 minutes after driving off from the seller, the check engine light came on.
    code p2191: lean at higher load bank 1.
    i replaced the upper o2 sensor, the map sensor and the pcv valve.
    i took a look at the sparkplugs, and they were all a little white.
    i have also tried looking for vacuum leaks, by holding a hand to the throttle body, which killed the engine – therefore i suspect no vacuum leaks?
    the engine does not misfire, it starts right up and runs smoothly – the only signs of it running lean is the lack of power and the cel.

    if i get directly on to the highway within 10 miles, the cel will not come on.
    if i drive around town for 10-15 miles it comes on, when the engine gets warm.
    if it is already warm and i drive around town the cel will not come on.

    maybe you can help determine what the cause could be?

    best regards the frustrated amateur mechanic

    brand: kia
    model: forte
    year: 2010
    engine: 2.0

    november 16, 2021 at 12:23 am

    lean mixtures on high loads are often due to fuel delivery issues like a bad fuel pump, line, or a clogged filter. did you check the fuel pressure? if it was a long time ago you replaced the fuel filter, i would begin with that!

    old garage mechanic
    community member
    december 1, 2021 at 11:07 pm

    p2191,   you said you replaced the oxygen sensor,  check the fuel rail pressure.