OBD Guide

U028B

Lost Communication With Active Grille Air Shutter Module C

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced engine cooling efficiency
  • Possible increase in fuel consumption
  • Lack of response of active blinds to commands
  • Errors in the climate control system

Causes

  • Open or short circuit in the module circuit
  • Oxidized or damaged connector pins
  • Active blind module C fault
  • Problems with module power or grounding
  • ECU software error

How to Fix

  1. Check the integrity of the wiring harness to the module
  2. Clean the connector contacts from oxides
  3. Check the power supply and grounding of the module
  4. Replace the faulty active blind module
  5. Update ECU firmware if necessary

Related codes

Error U028B by Vehicle Brand