OBD Guide
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U128F

Gauge Control Module Lost Communication With BSI Radar Unit

U128F is an OBD-II diagnostic trouble code meaning: Gauge Control Module Lost Communication With BSI Radar Unit. Common causes: broken or damaged wires between modules, bsi radar module malfunction. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • No blind spot warnings
  • Error message on the dashboard
  • Blind spot indicators do not work
  • The malfunction indicator light may come on

Causes

  • Broken or damaged wires between modules
  • BSI radar module malfunction
  • Radar module power supply problems
  • Instrument panel module malfunction
  • Problems with the CAN bus

How to Fix

  1. Check the integrity of the wiring harness between the modules
  2. Check the power and ground of the BSI radar module
  3. Scan the CAN bus for errors
  4. Check the serviceability of the BSI radar module
  5. If necessary, replace the faulty module
  6. Repair only from an authorized dealer

Related codes

U128EU1290U1291

FAQ

What does the U128F code mean?

U128F is an OBD-II diagnostic trouble code that indicates: Gauge Control Module Lost Communication With BSI Radar Unit

What causes a U128F error code?

The most common causes of U128F include: Broken or damaged wires between modules; BSI radar module malfunction; Radar module power supply problems; Instrument panel module malfunction.

How do I fix a U128F diagnostic trouble code?

To fix U128F: Check the integrity of the wiring harness between the modules. Check the power and ground of the BSI radar module. Scan the CAN bus for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U128F?

Limited driving only, diagnose soon

How much does it cost to fix U128F?

The estimated repair cost for U128F is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat