O2 Sensor Circuit High Voltage Bank 2 Sensor 2

Where it lives

For P0158, the circuit described runs through the sensor. The description of P0158 puts it on bank 2.

Check these first

• A short to voltage on the bank 2 sensor 2 signal wire
• A failed downstream oxygen sensor on bank 2
• A rich condition on bank 2
• Resistance in the bank 2 sensor 2 wiring
• A contaminated oxygen sensor

What to do next

1. Inspect the bank 2 sensor 2 wiring for a short to voltage
2. Check for a rich condition on bank 2
3. Test the sensor 2 signal voltage
4. Replace bank 2 sensor 2
5. Verify the ECM if the reading stays high
6. Clear the code and retest

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