I have a Service Engine Soon light on - it came on shortly after pressure washing all the mud off from the engine compartment last weekend. I can't tell in the FSM guide which OS Sensor to focus on. I'm hoping maybe it's just damp from the cleaning & I'm ok replacing it if needed but wanted to make sure I buy and replace the right one. AutoZone pulled the code for me, and unfortunately it does not match up with any codes in the FSM manuals posted on the Nicoclub link. The other description from the AutoZone test says it's a Heated Oxygen Sensor- Bank 2 Sensor 1 (H02S21) and the 2nd shows - Failed Heated Oxygen Sensor- Bank 2 Sensor 1 (H02S21). Any suggestions? Thanks Kirk