Quote:
Originally Posted by Gilles
one week ago I got a CEL with the code P0440 (Fuel tank ventilation system),
which I erased with the Durametric but a week later (yesterday) it returned
but with an additional code # P0431 (Bank 2 catalyst warm up below threshold...
I looked up the PET and found out the P/N 997 201 251 00 (now 01) but the part cost $432... how can I check if this is the real cause for the code P0440 before buying an expensive part..?
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P0440:
- Faulty EVAP canister purge valve
- Blocked fresh air line
- Leaking EVAP purge valve
- Leaking line between EVAP canister and intake
- EVAP purge valve incorrectly installed
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