When it comes to sensors, especially oxygen sensors they are telling you what's going on with the fuel/air ratio, by giving you a lean code does not mean sensor failure. Don't shoot the messenger in other words and don't let a parts store tell you what you need. The most common failure in these is either the intake seals or pcv hoses. Spray a little water over the intake and listen for a slurping sound.
Wednesday, January 8th, 2014 AT 1:18 PM