What does code P1793 mean on Audi vehicles?
The transmission control module does not receive a signal from output speed sensor 2, forcing the transmission into limp mode.
OBD-II Code Audi
P1793 — Audi — Output Speed Sensor 2 Circuit No Signal
The transmission control module does not receive a signal from output speed sensor 2, forcing the transmission into limp mode.
Common symptoms
- Transmission enters limp mode
- harsh or limited shifting
Possible causes
- Faulty output speed sensor
- wiring failure
Initial recommendation
Test output speed sensor 2, inspect wiring and replace sensor if necessary.
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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