P0165 - O2 Sensor Circuit Slow Response (Bank 2 Sensor 3)

The oxygen sensor on bank 2 sensor 3 is responding too slowly to changes.

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Code Overview

The oxygen sensor on bank 2 sensor 3 is responding too slowly to changes.

Common Causes

• Failed oxygen sensor
• Damaged wiring or connector near the exhaust
• Open or short in the sensor or heater circuit
• Exhaust leak or fueling issue affecting the reading

Diagnostic Steps

1. Inspect the sensor wiring and connector near the exhaust
2. Check live sensor data and heater operation
3. Look for exhaust leaks or related fuel-control faults before replacing parts

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