Service engine light on today. Took to auto Zone. Printout said: AAEVAP large leak detcted. Printout explanation: 88-The ECH has detected a large leak in the EVAC system during system monitor test. Probale cause: 881- defective or loose fuel cap. 882- EVAP canister broke, hose crack or not connected. 003- Purge or vent solanoid defective. 883- Purge or vent solenoid defective. 884- Vacuum leak at engine.

SOURCE: The troubleshooting code is po440. It says the

A leak in the EVAP system can be a pain to resolve so be methodical. Start with the junction of the tube from the purge valve to the inlet manifold plenum. Disconnect this tube and block off the exposed port on the manifold. A great way for blocking off tubes and ports is to cut off the fingers of a rubber washing up glove and elastic bands to secure them over the exposed ends. First let us recap on the system. The EVAP system passively stores fuel vapour from the fuel tank in a charcoal filled canister. The canister can be located on the fender or bulkhead. When the engine is running above idle speed the ECU opens a purge valve connecting a pipe to the throttle body. A corresponding vent valve allows the ingress of air into the canister and this encourages fuel vapour to be drawn out of the canister through the purge valve to the throttle air intake mixture and thereafter to be burnt. The opening of the purge valve cycles with engine speed. The purge valve should be closed during idle. A faulty EVAP system manifest itself as erratic idling as it allows un-metered air into the system and compromises the inlet manifold vacuum. The blocking of the ports as initially suggested above should at least cause any erratic idling to be resolved. The EVAP system is not critical to engine performance, it is an emission control device, so the car may be run without issue until the fault is found. Look at the fuel cap, ensure that the rubber seal is intact. To make doubly sure give it a smear of grease. Next look at the disconnected 'purge valve to throttle' tube. Inspect it thoroughly for cracks, be quite rough and twist it around to get a good look. Now locate the purge valve. If it is electrically operated simply check for voltage continuity across its connector pins. An open circuit indicates a burnt out solenoid winding. Check the connection to the canister. Check the vent valve connections, and again check its electrical continuity. Check the tank to canister tubing and any connections. If you find no leaks you may need to take it to a garage that can do a smoke test on the system - this highlights the leaks as wisps of smoke appear where the leaks occur.

SOURCE: my service engine light came on..i went to

I just got home with the same issue. i changed my gas cap going cheap frst but I think the Purge is under the intake cover.