code reads below threashhold level on bank one? could it possibly be a bad wire or ground? i recently had to fix 3 wires running to the pcm becuase i had a cold air filter installed and it shredded up some wires. red wire,dark blue wire with black stripes and purple wire with black stripes.

Its hard to tell what those wires could be, I don't have my FSMs around to check

I would check the wires going to the front O2 sensor to see if any touched the manifold and melted

pretty funny you mentioned that right around the time i replaced my MAF sensor i could smell burning plastic but i could not see where it was comeing from,i never though of checking in back near the manifold........deededeee,i will have to check it out when the temp gets above 20 deg...

i looked in back where the o2 sensor is and the wire run straight into the wire harness so i so not see how it could have melted,but i did see a spark plug wire was touching the metal part of the sensor,that sensor looks like a pita to take out.

It could have just gone bad, hopefully someone will have a little more info because it isn't the cheapest part or fun to change without an O2 sensor socket and lots of extensions

99.9% of the time in the shop that code leads to needing to replace the cat.

When/If you do replace it, it takes some 15-20 minute driving of constant highway and city for you to get your readiness monitors to be able for yo to go through inspection.

I didn't catch the year of your car but if it'* 96-00 you can pass with 2 monitors not ready. 1 if your 01+.