2001 Cherokee engine light came on. Only had jeep for 4 days now. 95000 miles. Code is P0456. Read that this has been fuel cap issue. I cleaned the seal on the cap and the lip on the filler neck. I reset the code and will watch it. Also read that vacuum lines could be issue between engine and tank and leak detection pump and purge system. I don't have manual yet, so does anyone know where I can find evap system circuit diagram online?

 

i think on the inside of the hood it has a diagram of the vacuum hose. Plus a Small evap leak isnt something you can visible see. Its like a pin hole size or smaller

 

I'll send you a Private Message.

 

sbielaga check your messages.
Dan