What does code P0146 mean?
No activity detected from the rear oxygen sensor B1S3; signal remains flat
OBD-II Code
P0146 — Oxygen Sensor Circuit No Activity Detected Bank 1 Sensor 3
No activity detected from the rear oxygen sensor B1S3; signal remains flat
Common symptoms
- Irregular fuel consumption
- fixed mixture
- check engine light
Possible causes
- Failed sensor
- cut wiring
- open circuit
Initial recommendation
Check wiring continuity, inspect connector, 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
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