What does code U05A0 mean?

DTC codes / U05xx · Network communication / U05A0

U05A0Invalid Data Received From Evaporative Emission System Leak Detection Control Module

The U05A0 code means the engine control module (ECM) or another network module has received invalid or missing data from the evaporative emission (EVAP) system leak detection control module over the vehicle's communication bus. The computer detected a message that was absent, corrupted, or outside the expected range, so it cannot trust the leak detection module's readings.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.