U02B4
Lost Communication With Front Radar Module A
U02B4 is an OBD-II diagnostic trouble code meaning: Lost Communication With Front Radar Module A. Common causes: broken or damaged wiring harness to the radar, problems with power supply to the radar module. Estimated repair cost: $167–556.
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
Error U02B4 by Vehicle Brand
FAQ
What does the U02B4 code mean?
U02B4 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Front Radar Module A
What causes a U02B4 error code?
The most common causes of U02B4 include: 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.
How do I fix a U02B4 diagnostic trouble code?
To fix U02B4: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U02B4?
Do not drive — repair immediately
How much does it cost to fix U02B4?
The estimated repair cost for U02B4 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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