on the driver side
where is the IAT sensor located on 99 qx4 infiniti
2001 Infiniti QX4 Car Stereo Radio Wiring Diagram
Bank 1 sensor 1 is upstream bank 1 sensor 2 is downstream
bank 2 sensor 2 front bank after the cat
Bank 1 is the bank that sits closest to the front of the vehicle. Bank one is the bank with cylinder # 1. You have 4 oxygen sensors, (bank 1 sensor 1, bank 1 sensor 2, bank 2 sensor 1 and bank 2 sensor2). Follow the exhaust from the head of bank 1. The first sensor you come to is sensor 1, the second is sensor 2.
Is this bank 2 sensor 1 or sensor 2?
Bank 2 Sensor 2 is passanger side after cat.
Try to picture this Bank 1 Sensor 1 Bank 2 Sensor 1 Catalytic Conv. Catalytic Conv. Bank 1 Sensor 2 Bank 2 Sensor 2
bank 2 is passenger side, sensor 2 is rear sensor (after catalytic converter)
3, sensor 1 bank 1, sensor 2 bank 1, sensor 2 bank 2
The bank without a number onc cylinder in it is bank number 2. Sensor 2 is behind the catalytic converter.