1. aaronson07

    aaronson07 Bobtail Member

    1
    0
    Aug 29, 2019
    0
    I have a 2004 mbn cat. I get derated power and an engine flash code 25 when pulling hard. I gross average of 124000. Code 25 leads to a boost problem but if I leave my fan on constantly it never derates me. I’m am beyond confused on this and any help would be great. Thanks!
     
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  3. FreightyAK

    FreightyAK Light Load Member

    51
    42
    Aug 7, 2018
    AK
    0
    Check your boost pressure sensor and wires. Also check wastegate line and make sure its not pinched, rotted, broken, cracked etc.
     
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