What does code P1398 mean on Audi vehicles?
A short to ground has been detected in the engine RPM (TD) signal circuit.
OBD-II Code Audi
P1398 — Audi — Engine RPM Signal (TD) Short to Ground
A short to ground has been detected in the engine RPM (TD) signal circuit.
Common symptoms
- Engine does not start.
Possible causes
- Faulty wiring.
Initial recommendation
Inspect RPM signal circuit.
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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