What does code P1177 mean on BMW vehicles?
The oxygen sensor on bank 2 responds too slowly, affecting fuel mixture control.
OBD-II Code BMW
P1177 — BMW — Oxygen Sensor Slow Response (Bank 2)
The oxygen sensor on bank 2 responds too slowly, affecting fuel mixture control.
Common symptoms
- Check engine light on
Possible causes
- Faulty or aging oxygen sensor
Initial recommendation
Inspect and replace oxygen sensor if response is outside specification.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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