O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 2

Where it lives

For P22B7, the sensor sits on the circuit this code reports. The description of P22B7 puts it on bank 1.

Check these first

• A bank 1 sensor 2 pumping current trim wire shorted to voltage
• An open pumping current trim circuit
• A failed wideband oxygen sensor
• Faulty ECM trim control

What to do next

1. Read bank 1 sensor 2 pumping current trim on a scan tool
2. Test the trim wire for a short to voltage
3. Check the trim circuit for an open
4. Measure the sensor pumping current
5. Replace the bank 1 sensor 2 oxygen sensor if the circuit tests good
6. Clear the code and retest

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