Having problems with your 2001 Pontiac Grand Am SE ?

Hi , I have a 2001 Pontiac Grand Am Se 2.4 and my svc engine soon light came on so i did a diag test and it had code P0440 Evap Emission sys . i was told that was a vacuum leak somewhere?? so first i bought a new gas cap for that yr and model vehicle then i cleared the code and drove it and some miles later light was back on , then i was looking for cracked or ripped vac lines , found one and replaced it cleared code and drove it again and some miles later light was back on ????? my CAN OBD2 sc

Posted / edited by AnonymousUser on : 03-08-2020

Answers :

Your scanner probably said I/M rediness tests not complete. It takes most OBD II systems about 50 miles to complete all the self tests. Best way to find a vacum leak is to start the car and then using a spray can of carb cleaner, spray around any hoses and the intake manifold gasket. If there is a leak the engine will change speed. What code are you getting?
Find the charcoal canister back by the fuel tank just in front of the rear axle. There should be a large rubber hose coming out of it that goes to the vent solenoid. Pinch off that hose with a vice grip (only do this if it is rubber), clear the code, and drive it. If the code does not come back or you get a different code replace the vent solenoid.
Repair Help & Product Troubleshooting for 2001 Pontiac Grand Am SE

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