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International Automotive Technicians Network
Re: Code P04DB
Posted to HD/Fleet Forum on 3/1/2018

Like most generic codes for Japanese trucks, these are kind of nonsensical. I would remove the sensor in the crankcase breather hose from the front cover to turbo inlet. Heavy oil would indicate a torn breather bore seal, a common issue with the 4p10 engine. Y... Login to read more.