P0147 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 3)

Bank 1 sensor 3 oxygen sensor heater circuit fault detected.

Code Overview

Bank 1 sensor 3 oxygen sensor heater circuit fault detected.

Common Causes

• Failed heater element
• Blown fuse
• Open wiring
• Poor connector contact

Diagnostic Steps

1. Check heater circuit fuse and power supply
2. Measure heater resistance if accessible
3. Inspect the sensor connector for heat damage

Likely Repairs & Cost Guides

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

Related OBD Codes

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Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.