Saturn Repair Problems? Ask a Mechanic for Answers ASAP
its the rear o2 sensor behind the catylitic converter
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Bank 2 is the side of the engine located closest to the radiator. Sensor 1 is located in the exhaust manifold closest to the radiator. Follow the exhaust pipe down from that exhaust manifold, and sensor 2 will be located behind the catalytic convertor on that pipe. Here is a picture of Bank 2 sensor 1.
Sensor 1 is before the pre catalytic converter, it is screwed into the exhaust manifold. Sensor 2 is after the pre catalytic converter, it is screwed in the exhaust pipe. Bank 1 is the bank towards the firewall, bank 2 is towards the radiator.Sensor 1 is a 6 wire heated wide band lambda type, sensor 2 is a heated 4 wire sensor.