Check Engine Light Flash Code 25

Discussion in 'Peterbilt Forum' started by Pete475, Sep 19, 2021.

  1. Pete475

    Pete475 Bobtail Member

    Dec 13, 2020
    Good Morning I have another question.
    Little background first.
    I have been running my 05 Pete 378 with no problems. Today I degreased and washed down my engine which is a c15 Acert. When I fired her up to drive her back to the yard my check engine light came on at an idle and would go off under load. Now I have never had this problem before. Fault Code is 25 which is boost pressure sensor.
    Now the question is since I have had no problems before with it could it be it got wet some how and could be a fluke?
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