p0440 Buick LeSabre 2000

Question: My 2000 Buick  LeSabre has just failed the yearly emissions test. It had code PO440 for evap system leak. I changed the gas cap like a mechanic suggested, but the code came right back. What should I try next? Answer: OK, you’ve got a leak somewhere in the evaporation system. Mechanics like myself use […]