2008 Subaru outback 2.5 with 105K code P0457. What would be most likely cause?

Asked by Audio Sep 30, 2019 at 05:44 PM about the 2008 Subaru Outback 2.5 i

Question type: Maintenance & Repair

I have changed gas cap and checked purge valve because it is easy to get to.(I have physical limitations) It seems to work but does not hold vacuum on the evap side if more than a few inches of mercury is applied. I don't know how much vacuum is used. I fear the canister will need to be replaced but it is expensive.Do I really need to pay someone with a factory scan tool to diagnose this and what if they are wrong? I still have to pay again. Thanks

4 Answers

F_O_R answered 4 years ago

You may need a smoke test to find the vacuum leak. BTW. You are due for a timing belt change if it has not already been changed.

Mark helpful

Audio answered 4 years ago

About how much should a smoke test cost? I had the timing belt changed at 100K,Thanks

Mark helpful
3,260

GuruSW818 answered 4 years ago

Do you smell gas? Tank might have a small crack. If no other issues, given your Subie's a dozen years old, I'd just live with it unless it's just a cracked line or similarly easy repair. These venerable 2006-2009 era Legs and OBs are indeed starting to age out....

Mark helpful

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