You can do a search for " Weird O2 Readings " posted by Royal-T-LTD, his car had BLM's pegged at 160, had stalling problems when warm and had 000 displayed on his ScanMaster it ended up being a new O2 sensor (AFS-22) he installed. TurboDave says AC - AFS-20 is a better choise. Hope this helps, Kyle.