Check engine light p0457 - Subaru WRX Forum
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post #1 of 2 Old 04-01-2016, 09:13 PM Thread Starter
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Check engine light p0457

I have the light. I need all your help and experiences welcome. Went to auto zone last week and I have the check engine light p0457
1. Faulty gas cap
2. Faulty canister vent solenoid
3. Faulty canister purge solenoid
4. EVAP system hose malfunction

I did check gas cap it's on gasket is good looks pretty good. Now where do I start? Anyone have a diagnosis write-up? I did take a quick look at the canister down under the passenger side wires looked pretty dirty but all was hooked and clipped on same as the solenoid on the engine bay. Also is there another form with more traffic out there?
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post #2 of 2 Old 04-14-2016, 12:25 AM
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I had the same thing. Turns out that a hose, right in front of the box on the passenger side under the rear bumper, had a small hole in it where it had rubbed against a bolt for the last 9 years. It was on the front side right behind the sway bar mount. It was throwing all the same codes you mentioned. Double check your hoses.

2007 WRX sedan
Cobb Stage 2-protuned by P&L
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