Code P0456
Last edited by w203driver; Aug 5, 2014 at 04:43 PM.
Welcome to the forum!
The most common problem for that code would be the gas cap. If that's not the issue you will probably have to get a smoke test done to see where the leak is.
Here is the link for the gas cap, if needed:
AutohausAZ - Gas cap
Disclaimer: Make sure to check the year and model of the vehicle before placing the order.

Also. 2005 models frequently suffered a filler pipe crack which causes EECS codes. Smoke test will reveal.
Last edited by Glyn M Ruck; Aug 8, 2014 at 06:45 PM.


