Code P0455, large EVAP leak?

Hi Stephen,

Thanks for the question. This code means there is a large leak in the evap system, I would check the gas cap O ring to make sure that it is in good shape.

The code P0455 on a 2002 Jeep Liberty indicates a large leak in the Evaporative Emission Control System (EVAP).

This smoke machine works well for EVAP leaks:

https://amzn.to/3UMFbun

But I have seen the EVAP canister leak on these cars, here is the location of the canister and the EVAP system you can see how it works and where any potential leaks are. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.