What does code P1791 mean on Audi vehicles?
The transmission range display circuit is shorted to ground, causing erratic or incorrect gear indication.
OBD-II Code Audi
P1791 — Audi — Transmission Range Display Circuit Short to Ground
The transmission range display circuit is shorted to ground, causing erratic or incorrect gear indication.
Common symptoms
- Erratic or incorrect gear display
Possible causes
- Damaged wiring
- short to ground
Initial recommendation
Inspect circuit wiring for shorts to ground and repair as needed.
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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