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limp mode

  1. P0638, Idle hunting, Limp mode.

    Problems & Maintenance
    I've got a 2005 outback xt that will go into limp mode every month or two while throwing a P0638. Symptoms: -Idle hunting, rpms jump up and down -intermittant high rpm at low speeds/idle while off gas pedal - Limp mode about once a month With an obd 2 reader the throttle position moves up...
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