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Hi all,
I've been getting these codes recently, (P0442 more often). They both have to do with the EVAP emissions system. Most sources say to check the gas cap first...However, this has been over multiple fill-ups, although it has been happening more recently. The cap may be bad, but I'm thinking I need to replace the charcoal canister or the purge valve, but wasn't sure if there was another part I should look at first.
 

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if you have petrol "burping" gurgling up out of the spout, that is a sign of a faulty EVAP canister.

in my opinion, you are on the correct path with the purge control valve. you may have a faulty petrol cap too or a leak in the hose for the canister.
 
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