O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 2

Where it lives

For P2272, the part to look at first is the sensor named here. The description of P2272 puts it on bank 2.

Check these first

• A bank 2 sensor 2 O2 sensor signal stuck lean
• A contaminated bank 2 sensor 2 O2 sensing element
• An exhaust leak ahead of the bank 2 sensor 2 O2 sensor
• A failed bank 2 sensor 2 O2 sensor with a biased output

What to do next

1. Read bank 2 sensor 2 O2 voltage on a scan tool
2. Compare the bank 2 sensor 2 O2 reading to expected values
3. Check the bank 2 exhaust for leaks ahead of the sensor
4. Inspect the bank 2 sensor 2 O2 sensing element for contamination
5. Replace the bank 2 sensor 2 O2 sensor if it stays stuck lean
6. Clear the code and retest

Look up another code