What does code P0147 mean?
The heater circuit of the rear oxygen sensor B1S3 is not functioning
OBD-II Code
P0147 — Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 3
The heater circuit of the rear oxygen sensor B1S3 is not functioning
Common symptoms
- Cold start issues
- reduced mixture efficiency
- check engine light
Possible causes
- Open heater resistance
- blown fuse
- damaged wiring
Initial recommendation
Check fuse, repair wiring and replace oxygen sensor.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0147 with your vehicle's actual symptoms for more complete diagnostic guidance.
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