O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

Where it lives

For P2245, the sensor sits on the circuit this code reports. The description of P2245 puts it on bank 1.

Check these first

• A short to ground on the bank 1 sensor 1 O2 reference voltage wire
• A failed bank 1 sensor 1 O2 reference cell pulling voltage low
• Water intrusion at the bank 1 sensor 1 O2 connector
• An open in the bank 1 sensor 1 O2 reference ground

What to do next

1. Read bank 1 sensor 1 O2 reference voltage on a scan tool
2. Test the bank 1 sensor 1 O2 reference wire for a short to ground
3. Inspect the bank 1 sensor 1 O2 connector for water
4. Check the bank 1 sensor 1 O2 reference ground
5. Replace the bank 1 sensor 1 O2 sensor if the wiring tests good
6. Clear the code and retest

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