What does code P1159 mean on BMW vehicles?
The additive fuel trim on bank 1 is higher than expected, indicating excessive fuel correction.
OBD-II Code BMW
P1159 — BMW — Fuel Trim Additive Bank 1 Too High
The additive fuel trim on bank 1 is higher than expected, indicating excessive fuel correction.
Common symptoms
- Increased fuel consumption
Possible causes
- Faulty or leaking fuel injectors
Initial recommendation
Inspect fuel injectors and verify fuel pressure and trim values.
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.
Analyze this code with MecaOBD
Use the app to combine BMW code P1159 with your vehicle's actual symptoms for more complete diagnostic guidance.
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