What does code P1177 mean on Audi vehicles?
The oxygen correction behind the catalytic converter on Bank 2 has reached its limit.
OBD-II Code Audi
P1177 — Audi — O2 Correction Behind Catalyst Bank 2 Limit Attained
The oxygen correction behind the catalytic converter on Bank 2 has reached its limit.
Common symptoms
- Check engine light illuminated.
Possible causes
- Faulty catalytic converter or downstream O2 sensor.
Initial recommendation
Check downstream O2 sensor and catalytic converter.
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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