OBD Guide
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U11B9

Lost Communication With Radio Frequency Hub

U11B9 is an OBD-II diagnostic trouble code meaning: Lost Communication With Radio Frequency Hub. Common causes: radio module malfunction, problems with power supply to the radio module. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Remote door control does not work
  • Problems with Bluetooth connection
  • Push-button engine start does not work
  • Error message on the dashboard
  • Central locking doesn't work

Causes

  • Radio module malfunction
  • Problems with power supply to the radio module
  • Broken wires in the harness
  • Antenna problems
  • Software failure

How to Fix

  1. Check the radio module fuses
  2. Diagnose wire integrity
  3. Check the power supply and ground of the radio module
  4. Update module software
  5. Replacing the radio module if necessary

Related codes

U11B8U11BAU11BB

FAQ

What does the U11B9 code mean?

U11B9 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Radio Frequency Hub

What causes a U11B9 error code?

The most common causes of U11B9 include: Radio module malfunction; Problems with power supply to the radio module; Broken wires in the harness; Antenna problems.

How do I fix a U11B9 diagnostic trouble code?

To fix U11B9: Check the radio module fuses. Diagnose wire integrity. Check the power supply and ground of the radio module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U11B9?

Yes, but get it checked soon

How much does it cost to fix U11B9?

The estimated repair cost for U11B9 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat