P0030 - HO2S Heater Control Circuit (Bank 1 Sensor 1)

The heater circuit for the upstream oxygen sensor on bank 1 is not operating correctly.

Code Overview

The heater circuit for the upstream oxygen sensor on bank 1 is not operating correctly.

Common Causes

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

Diagnostic Steps

1. Inspect O2 sensor connector and wiring
2. Check heater fuse
3. Verify heater circuit power and ground
4. Check for exhaust heat damage to wiring

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

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