Lost Communication With Dynamic Seat Bolster Module
The U0248 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Dynamic Seat Bolster Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $800 (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 side bolsters not adjusting during turns
- Cornering seat support feature disabled
- Seat bolster motor noise without movement
- Dynamic seat setting not available
Probable Causes (Ranked by Likelihood)
- Failed seat bolster actuator Very High
- Seat bolster motor burnout High
- CAN bus wiring fault to seat module Moderate
- Software error in seat controller Low
Step-by-Step Diagnostic Procedure
-
Scan seat control module for codes
-
Test seat bolster motor operation
-
Check wiring to dynamic bolster system
-
Verify seat module software
Frequently Asked Questions
Can I drive with U0248?
Yes. The seat still functions normally, just without dynamic bolster adjustment.
What causes U0248?
Usually a failed bolster actuator or motor in the seat assembly.
What are dynamic seat bolsters?
They inflate or deflate during cornering to provide better lateral support.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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