What does code P1181 mean on Audi vehicles?
An open circuit has been detected in the reference voltage supply of the linear oxygen sensor.
OBD-II Code Audi
P1181 — Audi — Linear O2 Sensor Reference Voltage Open Circuit
An open circuit has been detected in the reference voltage supply of the linear oxygen sensor.
Common symptoms
- Oxygen sensor does not operate correctly.
Possible causes
- Open circuit in reference voltage line.
Initial recommendation
Check reference voltage supply.
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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