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p0638

  1. Problems & DIY 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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