O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 2

Where it lives

For P22AB, the sensor sits on the circuit this code reports. The description of P22AB puts it on bank 1.

Check these first

• An open positive current wire to bank 1 sensor 2
• A failed wideband oxygen sensor 2 on bank 1
• Corrosion at the bank 1 sensor 2 connector
• A chafed harness near the exhaust
• An ECM driver fault on the positive current circuit

What to do next

1. Inspect the bank 1 sensor 2 wiring and connector
2. Watch bank 1 sensor 2 live data
3. Test the positive current wire for an open
4. Check the ECM driver for the bank 1 sensor 2 circuit
5. Replace bank 1 sensor 2 if the wire tests good
6. Clear the code and retest

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