O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 2

Where it lives

For P22AC, the circuit described runs through the sensor. The description of P22AC puts it on bank 1.

Check these first

• The bank 1 sensor 2 positive current wire shorted to ground
• A failed wideband oxygen sensor 2 on bank 1
• Corrosion at the bank 1 sensor 2 connector
• Low battery voltage dropping the current signal
• An ECM driver fault on the positive current circuit

What to do next

1. Test the bank 1 sensor 2 positive current wire for a short to ground
2. Check battery and charging voltage
3. Inspect the bank 1 sensor 2 connector for corrosion
4. Watch bank 1 sensor 2 live data
5. Replace bank 1 sensor 2 if the wire tests good
6. Clear the code and retest

Look up another code