O2 Sensor Bank 1 Sensor 2

Where is Bank 2 Sensor 1 Located?

Introduction

Diagnostic trouble code (DTC) P0136 indicates an O2 sensor circuit malfunction in Bank 1. This code can be caused by wiring problems, damage to the sensor, or an exhaust leak.

Understanding Bank 1 and Sensor 1

The term "Bank 1" refers to the side of the engine that contains cylinder number 1. "Sensor 1" indicates the first oxygen (O2) sensor located closest to the engine, also known as the upstream sensor.

Locating Bank 2 Sensor 1

Bank 2 Sensor 1 is situated on the opposite side of the engine from Bank 1. To locate it:

1. Identify the engine's "V" shape.
2. Find the exhaust manifold on Bank 2 (the side without cylinder number 1).
3. Trace the exhaust pipes from the manifold to the catalytic converter.
4. The first O2 sensor closest to the engine (upstream) is Bank 2 Sensor 1.

Additional Information

• O2 Sensor Bank 1 Sensor 2: Measures voltage produced by the oxygen sensor in Bank 1, downstream from the catalytic converter.
• O2 Sensor Bank 2 Sensor 2: Located downstream of the catalytic converter in Bank 2.

Conclusion

Knowing the location of Bank 2 Sensor 1 is crucial for proper diagnosis and repair of O2 sensor-related issues. By following the steps outlined above, you can effectively locate and address any problems with this sensor.