Lost Communication With Seat Ventilation Module
The U0249 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Seat Ventilation Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $200 - $700 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Seat cooling not working
- Ventilated seat fan not running
- Seat ventilation button not responding
- Only heating works but not cooling
Probable Causes (Ranked by Likelihood)
- Failed seat ventilation fan motor Very High
- Seat ventilation module failure High
- CAN bus wiring fault in seat Moderate
- Clogged seat ventilation filter Low
Step-by-Step Diagnostic Procedure
-
Check seat ventilation fan operation manually
-
Clean or replace seat ventilation filter
-
Scan seat module for fault codes
-
Test power supply to ventilation fans
Frequently Asked Questions
Can I drive with U0249?
Yes. Only the seat cooling feature is affected.
What causes U0249?
Usually a failed ventilation fan motor or clogged filter under the seat.
How much does U0249 cost to fix?
Typically $200 to $700. Fan replacement is the most common repair.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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