What was the exact code they pulled? There are 3 - 4 O2 sensors on your vehicle you may not have change the correct one.
Here how the O2 sensor Banks work.
Bank 1 is on the Passenger Side.
Bank 1 Sensor 1 is in the exhaust manifold.
Bank 1 Sensor 2 would be the next one back or in front of the cat.
If single exhaust sensor 2 could be called the Upstream sensor, and Sensor 3 would be after or behind the cat and could be called the Down Stream
Bank 2 is the Drivers Side.
Bank 2 Sensor 1 would be in the exhaust manifold.
If single exhaust the above paragraph with the upstream and downstream sensor goes.
If Dual Exhaust then.
Bank 2 Sensor 2 would be in front of the cat.
Tuesday, March 3rd, 2009 AT 9:13 PM