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    Doosan HP375 / 425 Problems

    I have 2 Doosan HP375/425 Compressors.... Issue 1 - 2018 Doosan less than 1000 Hrs.... Here are the Codes: SPN 1569 / SPN 5245 / SPN 91 I am pretty sure this is the DEF Head issue that is fairly frequent in them but the SPN 91 is a Throttle Position issue.... Is this related? The compressor...
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