What does code P1799 mean on Audi vehicles?
The output speed sensor 2 reports excessively high RPM values, causing the transmission to enter protective or limp mode.
OBD-II Code Audi
P1799 — Audi — Output Speed Sensor 2 Circuit RPM Too High
The output speed sensor 2 reports excessively high RPM values, causing the transmission to enter protective or limp mode.
Common symptoms
- Transmission in limp mode
- harsh or limited shifting
Possible causes
- Erroneous sensor signal
- faulty sensor
- wiring fault
Initial recommendation
Perform advanced transmission diagnostics, verify sensor readings and wiring.
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.
Analyze this code with MecaOBD
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