U01BD

Lost Communication With DC/DC Converter Control Module C

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine Light Is On
Problems with the start-stop system
Reduced hybrid system efficiency
Unstable operation of the vehicle's electrical system
Errors in other related systems

Causes

Open or short circuit in the communication circuit
DC/DC module failure
Poor contact in connectors
Module power problems
Software error in the ECU

How to Fix

Check the integrity of the wiring harness and connectors
Check the power and ground of the DC/DC module
Scan the DC/DC module for additional errors
If necessary, replace the DC/DC module
Update ECU software if updates are available

Related codes

U01BC U01BE U0100