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.

  • never0101@alien.topBEnglish
    1·
    10 months ago

    They said that they don’t know what the error codes are and that their OBD reader just diagnoses the problem for them.

    Lol good fuck, never go back there again. Yes there’s lists of codes and their corresponding diag charts in the vehicles service manual. You can subscribe to somethjng like alldatadiy to get all tbat info.

  • opmwolf@alien.topBEnglish
    1·
    10 months ago

    U0073 seems to be caused by the OBD reader itself, duscussed here: https://www.subaruoutback.org/threads/code-u0073-after-running-activeobd-app-with-obdlink-lx-bluetooth-scan-tool.427513/

    As for P1468, it has something to do with the Diesel Particulate Filter (DPF). The dealer will try to sell you a new DPF, there is a DPF regenration process but it needs a bi directional scan tool. Shown here: https://youtu.be/eFg-N-4fV84

    Keep in mind this is what i found searching those codes on google.

  • 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.