About every 2 weeks this car will set code po421. The car runs good and has no exhaust leaks. I have changed both o2 sensors. And they are working on the snapon scanner. The teck before me changed the mass airflow sensor . I don't know why. He don't work for u...

Summary posted 5/8/2003

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle