What does code P1797 mean on Audi vehicles?
The vehicle speed signal circuit is shorted to battery positive (B+), leading to incorrect speed information.
OBD-II Code Audi
P1797 — Audi — Vehicle Speed Signal Circuit Short to B+
The vehicle speed signal circuit is shorted to battery positive (B+), leading to incorrect speed information.
Common symptoms
- Erratic speedometer operation
- incorrect speed display
Possible causes
- Damaged wiring
- short to battery positive
Initial recommendation
Inspect vehicle speed signal circuit for shorts to B+ and repair 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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