I have a 2005 Ford Expedition. My check engine light has been on for almost a year now. The code it throws is the O2 sensor, bank 2. I have had the sensor replaced 3 times. I've also had the spark plugs and coils replaced. Light is still on. Trucks performance is decreasing. Exhaust recently started smelling bad. Truck will shake at idle and sounds like its going to cut out. My friend (who is an airplane mechanic, but also knows a great deal about cars) said he thinks it's the cat converter. He's never looked at my truck but feels that's what it is. I've brought my truck into two different places, one being a Meineke, and they both said that the "code" says its the O2 sensor and that as far as they could tell, the cat was fine. WELL. CLEARLY SOMETHING IS CAUSING THE O2 SENSOR TO CONTINUE TO FAIL! Any ideas. Please help!
Thursday, August 30th, 2012 AT 8:48 AM