U02B4

Lost Communication With Front Radar Module A

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Error message on the dashboard
Disabling active safety systems
Adaptive cruise control functions do not work
Brake Assist Warning

Causes

Broken or damaged wiring harness to the radar
Problems with power supply to the radar module
Malfunction of the radar module itself
Connector problems or contact corrosion
Software error in the ECU

How to Fix

Check the integrity of the wiring harness to the radar module
Check power and ground at the radar connector
Inspect connectors for corrosion or damage
Carry out diagnostics of the radar module
Repair only from an authorized dealer

Related codes

U02B5 U02B6 C1A00