Originally Posted by
JoXfire
Thanks to both of you for the quick responses.
The person at Autozone said the code was P0455, evaporation emission system leak. The manager then came over and asked if I had opened and closed the gas cap and if the blue plastic around the gas cap was at all damaged. I went out and opened and closed it again, and no, the blue plastic was in perfect condition. I still had the check engine light on, so the manager told me I should purchase a new gas cap, Duralast Fuel Cap item 6842. Should I do that?
For the scanner, is this the one you're talking about
:
https://smile.amazon.com/gp/product/...D1JAFECP&psc=1
I really appreciate the assistance here. I can change a tire and my windshield wipers, but my mechanical skills aren't much beyond that!
The most common reason for an evap leak error code is a loose gas cap, however, besides a leaking gas cap there are other components that can cause that error. The cap could be bad but I suspect not. A gas cap is not a high priced item. If you are in a hurry to resolve the problem you can buy it and have it as a spare if it does not solve the evap leak test.
Here is part of the Mercedes drive cycle procedures pertaining to the Evap readiness test.
The Amazon link is to the BlueDrive I'm talking about. I see today 8/14 there is a $20 off coupon. I have not done a comprehensive comparison of all it's functions, capability, or limitations. It is quick and easy to use and does have some very nice features.