Source-backed diagnostic reference

U0073 EV diagnostic code

A faulty control module, A problem with the CAN bus

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

AUDI: A faulty control module, A problem with the CAN bus Source
GENERIC: Control Module Communication Bus A Off Source
GENERIC: Control Module Communication Bus "A" Off Source

Search and canonical URL

Capitalization, underscores, hyphens, colons and spaces are normalized to this canonical code identity so alternate scan-tool formats do not create duplicate pages.