Subaru Problems? Ask a Mechanic for Answers ASAP
Hello my name is***** am an ASE Master Technician and I am glad to help you with your question.
Do you have any codes now? Have you replace the fuel filter?
As the fuel enters the fuel tank, the tank inside pressure increases. When the inside pressure becomes higher than the atmospheric pressure, the port of the vent valve opens, allowing the fuel vapors to be introduced into the canister through the vent line. The fuel vapors are absorbed by charcoal in the canister, so the air discharged from the drain valve contains no fuel. When a filler gun is inserted, the shut-off valve closes the evaporation line.
Here is a diagram of the system.
The most common problem for your 1443 is the vent solenoid valve needs to be replaced.
Here is chart for the code you have.
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Did you use a oem part?
You probably have another problem. I have seen spider webs in the vent hose cause this problem.
Yes, check all the hoses and make sure none are clogged. Check the hoses that go up the filler neck too.
You sometimes have to drop the tank. We use compressed shop air to blow air through the hoses. Dropping the tank is a huge project on this. The rear end and exhaust need to be removed.
Evap codes take a while to return. Did you clear the codes after installing the new part?
It could be still letting some pressure out through the vent just not enough. It may not be a complete clog.