O2 Sensor Signals Swapped Bank 2 Sensor 1/Bank 2 Sensor 2

Where it lives

For P241B, the part to look at first is the sensor named here. The description of P241B puts it on bank 2.

Check these first

• Bank 2 sensor 1 and sensor 2 connectors swapped
• Crossed wiring between the two bank 2 oxygen sensors
• A failed bank 2 sensor 1 or sensor 2
• A harness repair that misrouted the sensor leads

What to do next

1. Compare bank 2 sensor 1 and sensor 2 signals on a scan tool
2. Verify each connector sits on the correct bank 2 location
3. Trace the bank 2 sensor wiring for crossed leads
4. Test each sensor for correct output
5. Reconnect or replace the affected sensor if the wiring is correct
6. Clear the code and retest

Look up another code