What does code P1134 mean on BMW vehicles?
The heater circuit signal of the downstream oxygen sensor on bank 1 is intermittent, affecting sensor warm-up consistency.
OBD-II Code BMW
P1134 — BMW — Oxygen Sensor Heater Circuit Signal Intermittent (Bank 1 Sensor 2)
The heater circuit signal of the downstream oxygen sensor on bank 1 is intermittent, affecting sensor warm-up consistency.
Common symptoms
- Intermittent check engine light
Possible causes
- Loose wiring connections
- poor electrical contact
Initial recommendation
Inspect heater circuit connections and wiring for looseness or corrosion.
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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