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14/12/2024 10:51 am
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Any advice for an P0456 error on a e320 Mercedes with 221K miles. I replaced the gas cap, purge valve and damping canister already... car runs smoother but still get the code.
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14/12/2024 11:53 am
Did any of those parts test as bad before you replaced them? A leak anywhere in the system can cause P0456 and you can expect rubber parts to deteriorate over 20 years and hundreds of thousands of miles. Physical examination of hoses or a smoke test may find the problem.
https://www.obd-codes.com/p0456
Additionally, please do not click on the submit button multiple times - you accidentally posted this four times. The site can be slow to respond but has actually processed your post immediately. Thank you.
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