What does code P1087 mean on BMW vehicles?
The oxygen sensor on bank 1 sensor 1 responds too slowly during lean mixture control.
OBD-II Code BMW
P1087 — BMW — Oxygen Sensor Circuit Slow Response in Lean Control Range (Bank 1 Sensor 1)
The oxygen sensor on bank 1 sensor 1 responds too slowly during lean mixture control.
Common symptoms
- Check engine light
- slow fuel trim adjustments
Possible causes
- Aged or contaminated oxygen sensor
Initial recommendation
Replace oxygen sensor if response time 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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