U3034

Communication Authentication Key/Certificate Missing/Invalid

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

~$167 (est.)

Symptoms

Check Engine light comes on
Restricted functionality of some vehicle systems
Problems starting the engine
Infotainment system malfunctions

Causes

Module software reset or corruption
Firmware update failed
Problems with the battery or module power
Authentication key mismatch after module replacement
Damage to the wiring harness between modules

How to Fix

Check the condition of the battery and the voltage in the on-board network
Scan all modules for additional errors
Try resetting the modules (disconnecting the battery for 15-30 minutes)
Update or reflash affected modules
Contact your dealer to re-authenticate the modules

Related codes

U3000 U3003 U3010