2 error codes popped up today on my OBD reader for my 2015 Diesel Subaru Forester, U0073 and P1468.

I took the car into my local Subaru mechanic and asked for a diagnosis of the error codes. They refused to tell me. They said that they don’t know what the error codes are and that their OBD reader just diagnoses the problem for them.

My question is,

  1. is there an official Subaru OBD code handbook?

  2. What’s the point of having an OBD reader if I can’t locate the codes?

Many thanks in advanced.

  • RudbeckiaIS@alien.topBEnglish
    1·
    10 months ago

    P1468 is an oil dilution warning… but check oil level beforehand. If it’s over the max line, you have a problem with DPF regeneration, the bane of small diesel engines. If not it’s a DCM glitch: wipe the code clean and see if it comes back. if it does there is a DCM update from Subaru to try and solve these false warning issues.

    U0073 makes me think the latter is the case: there was another ECU/DCM update for persistent U0073 that included both otto and diesel models. Again, wipe the code clean and drive the car normally. If the code come back you will need to book an appointment with a Subaru dealership to update the DCM.

    These boxer diesel are not cars anybody likes to work on, this is a classic case of “I don’t want this job”: why not simply say so, it’s beyond me.