Lost Communication With Seat Control Module A
What does U0149 mean?
The U0149 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Seat Control Module A. This is a low severity code.
Common Symptoms
- Power seat adjustments not working
- Seat memory positions not recalling
- Heated or ventilated seat not functioning on driver side
- Seat position warning light or message
- Lumbar support adjustment inoperative
Probable Causes (Ranked by Likelihood)
- Failed seat control module under driver seat Very High
- Damaged wiring harness under driver seat High
- Corroded connector at seat module Moderate
- Seat track pinching wiring harness Moderate
- Blown seat module fuse Low
Step-by-Step Diagnostic Procedure
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Check the seat control module fuse in the fuse box
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Scan for DTCs in the seat and body control modules
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Inspect the wiring harness under the driver seat for pinched or cut wires
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Check the connector at the seat control module for corrosion
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Verify power supply and ground at the seat module
Frequently Asked Questions
Can I drive with code U0149?
Yes. This code only affects power seat functions. If you can adjust the seat to a safe driving position manually, you can drive normally.
What causes U0149?
The most common cause is a failed seat control module or damaged wiring under the driver seat. Wires running under seats are frequently damaged by objects stored under the seat or by seat track movement.
Is U0149 expensive to fix?
Repairs range from $100 for a fuse or wiring fix to $600 for a seat control module replacement. The module is typically located under the seat and is accessible without removing the seat.