Lost Communication With Transfer Case Shift Module
The U0280 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Transfer Case Shift Module. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $400 - $1,500 (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
- Cannot switch between 2WD and 4WD
- Transfer case stuck in one mode
- 4WD indicator light flashing
- Grinding noise when attempting to shift
- Service 4WD system message
Probable Causes (Ranked by Likelihood)
- Failed transfer case shift motor Very High
- Transfer case control module failure High
- CAN bus wiring fault to transfer case Moderate
- Transfer case encoder ring failure Low
Step-by-Step Diagnostic Procedure
-
Check transfer case fluid level
-
Scan transfer case module for codes
-
Test shift motor operation
-
Inspect encoder ring position sensor
Frequently Asked Questions
Can I drive with U0280?
Short distances. Stay in the current drive mode and avoid shifting.
What causes U0280?
Usually a failed shift motor or encoder ring in the transfer case.
How much does U0280 cost to fix?
Between $400 and $1,500.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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