On a Nissan QX4, the Bank 2 sensor, which refers to the oxygen sensor, is typically located on the side of the engine that does not contain the cylinder number one. For a V6 engine, this means Bank 2 is on the passenger side. The sensor can usually be found before or after the catalytic converter, depending on whether you are looking for the upstream or downstream sensor.
on the driver side
The QX4 code P0158 refers to a problem with the oxygen sensor circuit, specifically indicating a high voltage signal from the downstream oxygen sensor (Sensor 2) of bank 2. This typically suggests that the sensor may be malfunctioning, there could be a wiring issue, or a potential exhaust leak affecting the sensor readings. It is essential to diagnose the specific cause to ensure proper vehicle performance and emissions control.
2001 Infiniti QX4 Car Stereo Radio Wiring Diagram
where is the IAT sensor located on 99 qx4 infiniti
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?
On a 2003 Infiniti QX4, the Bank 1 Sensor 1 O2 sensor is located on the exhaust manifold, upstream of the catalytic converter. This sensor measures the oxygen content in the exhaust gases before they enter the catalytic converter, helping to regulate the air-fuel mixture for optimal engine performance. To access it, you may need to lift the vehicle and work under it, as it's positioned close to the engine.
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)