Error code

OBD2 U0303

OBD2U0303
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Software Incompatibility with Transfer Case Control Module.

Severity

moderateCan drive but may experience shifting issues and reduced performance.

Summary

U0303 indicates software incompatibility with the transfer case control module, which is related to issues between different electronic components of the drivetrain.

Common Causes

  • Software update or installation error
  • Faulty transfer case control module

Fixes

  • Update or reinstall compatible software for the transfer case control module.

FAQ

What does U0303 mean?

U0303 indicates a software incompatibility issue with the transfer case control module.

How do I fix it?

You may need to update or reinstall compatible software for the transfer case control module. Consult a professional mechanic if unsure.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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