Originally Posted by
jgreen
Just to recap.. The engine light was on before any of the orginal O2 sensors were replaced. When the dealer started to troubleshooting they started with the O2 sensors replaced all of them and one sensor they replaced twice, the PCM (or BCM) replaced twice, then the cats, and a pcv valve.
Once I removed the 40amp fuse on Sunday and drove around starting and stopping 4 times the light is now off. The new pending code is the P0410 -AIR System.
Maybe the air pump is running when it shouldn't and that would cause a lean code, correct? You might have found a cause. Before you pulled the fuse, could you hear it running after initial warm-up?