U028B
Lost Communication With Active Grille Air Shutter Module C
U028B is an OBD-II diagnostic trouble code meaning: Lost Communication With Active Grille Air Shutter Module C. Common causes: open or short circuit in the module circuit, oxidized or damaged connector pins. Estimated repair cost: $56–167.
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
- Check the integrity of the wiring harness to the module
- Clean the connector contacts from oxides
- Check the power supply and grounding of the module
- Replace the faulty active blind module
- Update ECU firmware if necessary
Related codes
Error U028B by Vehicle Brand
FAQ
What does the U028B code mean?
U028B is an OBD-II diagnostic trouble code that indicates: Lost Communication With Active Grille Air Shutter Module C
What causes a U028B error code?
The most common causes of U028B include: Open or short circuit in the module circuit; Oxidized or damaged connector pins; Active blind module C fault; Problems with module power or grounding.
How do I fix a U028B diagnostic trouble code?
To fix U028B: Check the integrity of the wiring harness to the module. Clean the connector contacts from oxides. Check the power supply and grounding of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U028B?
Yes, but get it checked soon
How much does it cost to fix U028B?
The estimated repair cost for U028B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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