What does code P1151 mean on BMW vehicles?
The heater circuit signal of the upstream oxygen sensor on bank 2 is intermittent.
OBD-II Code BMW
P1151 — BMW — Oxygen Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor 1)
The heater circuit signal of the upstream oxygen sensor on bank 2 is intermittent.
Common symptoms
- Intermittent check engine light
Possible causes
- Faulty wiring
- loose electrical connections
Initial recommendation
Inspect heater circuit connections and wiring integrity.
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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