It is behind the catalytic converter
Bank one is the side of the engine with cylinder #1. Sensor 2 is after the catalytic converter.
Standing in the front of the engine: Bank 2 is the left head and 02 sensor 1 will be the first and closest sensor in the exhaust pipe were the pipe hooks to the engine.
Bank 2 is the passenger side of the engine. and the 02 senser is screewed into the exhaust pipe on that side. Work your way back to the muffler and you will see it.
Before the catalyst, driver side.
which sensor is for bank 1 sensor 1 on a 2006 nissan xterra
drivers side, after catalytic converter.
where is the oxygen sensor in a 1995 gmc jimmy
This means that the Oxygen sensor #1 on bank one went lean and stayed lean for longer than allowed.Look for in this order:Cylinders miss-firingVacuum leaksExhaust manifold leaksFaulty sensor.
This would be the sensor after the catalytic converter.
Trouble code P0135 means:O2 sensor heater circuit malfunction (Bank 1 Sensor 1)
It would be the sensor after the catalytic converter.