O2 Sensor Circuit Bank 2 Sensor 1

Where it lives

For P0150, the circuit described runs through the sensor. The description of P0150 puts it on bank 2.

Check these first

• A failed upstream oxygen sensor on bank 2
• A wiring fault on the bank 2 sensor 1 circuit
• A corroded sensor 1 connector
• An exhaust leak near sensor 1
• A faulty ECM input

What to do next

1. Read bank 2 sensor 1 on a scan tool
2. Inspect the sensor 1 wiring and connector
3. Check for exhaust leaks near sensor 1
4. Test the sensor 1 signal circuit
5. Replace bank 2 sensor 1
6. Clear the code and retest

Look up another code