P0050 - HO2S Heater Control Circuit (Bank 2 Sensor 1)

The heater circuit for the upstream oxygen sensor on bank 2 is not operating correctly.

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Code Overview

The heater circuit for the upstream oxygen sensor on bank 2 is not operating correctly.

Common Causes

• Faulty oxygen sensor heater
• Open or shorted wiring
• Blown fuse
• Connector damage

Diagnostic Steps

1. Inspect upstream O2 sensor wiring on bank 2
2. Check heater fuse
3. Verify power and ground to the heater circuit
4. Check for melted or rubbed-through wires

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