O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 1

Where it lives

For P2234, the sensor sits on the circuit this code reports. The description of P2234 puts it on bank 2.

Check these first

• A short between the bank 2 sensor 1 O2 signal and heater wires
• Melted or chafed bank 2 sensor 1 O2 wiring joining the two circuits
• A failed bank 2 sensor 1 O2 sensor with an internal short
• Water intrusion at the bank 2 sensor 1 O2 connector bridging pins

What to do next

1. Read bank 2 sensor 1 O2 signal and heater status on a scan tool
2. Test the bank 2 sensor 1 O2 signal wire for a short to the heater wire
3. Inspect the bank 2 sensor 1 O2 harness for melted or chafed spots
4. Check the bank 2 sensor 1 O2 connector for water
5. Replace the bank 2 sensor 1 O2 sensor if the wiring tests good
6. Clear the code and retest

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