What does code P1864 mean on Audi vehicles?
The powertrain CAN data bus is missing messages from the ADR control module, limiting stability-related functions.
OBD-II Code Audi
P1864 — Audi — Data-Bus Powertrain Missing Message from ADR Control Module
The powertrain CAN data bus is missing messages from the ADR control module, limiting stability-related functions.
Common symptoms
- Limited stability functions
- warning indicators
Possible causes
- CAN bus communication error
- ADR module fault
Initial recommendation
Perform ADR system and CAN bus diagnostics.
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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