Bank 1 O2 Sensor

Originally Posted by gomer_110

OP, I assume you mean the code was P2A00 which is the passenger side primary O2 sensor (Bank 1 Sensor 1). You might want to check for leaks on the intake side after the MAF sensor and exhaust leaks before the O2 sensor. There are a number of threads on here that are about this trouble code and iirc none of them required replacing the cat or O2 sensors.