What does code U033A mean?

DTC codes / U03xx · Software and configuration mismatches / U033A

U033ASoftware Incompatibility With Hybrid/EV Battery Interface Control Module A

This code means the hybrid or electric vehicle battery interface control module A is reporting a software incompatibility over the vehicle's communication network, typically because the module's calibration or software version does not match what the other control modules expect. The computer detected a mismatch in software identification or handshake data between the battery interface module and the rest of the vehicle's systems, so it stored U033A and may illuminate the warning light.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaSoftware and configuration mismatches

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