What does code P0154 mean?
The front oxygen sensor B2S1 shows no activity and signal does not change
OBD-II Code
P0154 — Oxygen Sensor Circuit No Activity Detected Bank 2 Sensor 1
The front oxygen sensor B2S1 shows no activity and signal does not change
Common symptoms
- Increased fuel consumption
- fixed mixture
Possible causes
- Failed sensor
- open wiring
- exhaust leak
Initial recommendation
Check wiring continuity, repair exhaust leaks and replace 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 P0154 with your vehicle's actual symptoms for more complete diagnostic guidance.
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