my CEL says code 1, i check in the thread of ecu codes and it says Oxygen sensor #1. and i look under oxygen sensor 1 it has a #2 as well, where can i find the oxygen sensor #1 in my engine and where can i find the #2 in my engine. thanks.

 

well if your asking for their location, #1 is just before the cat converter and #2 is right after the cat converter on your exaust.

 

the primary O2 sensor or #1 as you refered to it is in the exhaust manifold, accessed fromt he engine bay, this monitors A/F and the secondary O2 senor is after the cat under the car which determines if your cat is doing its job

 

by the way

just replace the O2 sensors and youll be fine