What does code P1084 mean on BMW vehicles?
The oxygen sensor on bank 1 sensor 1 detects a rich air-fuel mixture condition.
OBD-II Code BMW
P1084 — BMW — Fuel Control Mixture Rich (Bank 1 Sensor 1)
The oxygen sensor on bank 1 sensor 1 detects a rich air-fuel mixture condition.
Common symptoms
- Increased fuel consumption
- fuel odor
Possible causes
- Leaking injector
- faulty oxygen sensor
Initial recommendation
Inspect fuel injectors and verify oxygen sensor readings.
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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