We have a 2001 jeep cherokee laredo and the code that came up with the check engine light was P0456. When we took it to autozone they said it was something with the evap system or a vaccum tube. While looking under the hood we noticed a broken par coming off the front of the engine. "PVC elbow and gromet". Fixed that and still can't get the engine light to go off. Advice?

SOURCE: possible vaccum in fuel tank, EVAP system.

TRY REPLACING THE EVAP CANISTER

SOURCE: 2003 Jeep Grand Cherokee Laredo - Code P0456 EVAP leak

open hood and ck for broken vacuum hoses going to the purge valve(2 vacuum ports and a wiring connector)
on the drivers side between airbox and firewall
if good remove driver side rear tire and inspect hoses next to the gas tank and 3rd, the canister is in that wheel well also insp for cracked hoses there also, been working for jeep 12 years i charged people about 1 hour to correct this probem.

Testimonial: "Thanks!"

SOURCE: 2000 daewoo leganza the pvc elbow

I use a web site www.car-parts.com to find used parts all over the country. The site sorts by price and location so you can order what you need from anywhere you want.