Error code
OBD2 U0403
OBD2U0403
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Invalid Data Received From Transfer Case Control Module.
Severity
moderateCan be driven, but may experience shifting issues.
Summary
U0403 indicates that the car's computer is receiving invalid data from the transfer case control module, which manages gear ratios in vehicles with automatic transmissions.
Common Causes
- Faulty or damaged wiring between the transfer case control module and the vehicle’s main computer
- Malfunctioning transfer case control module
Fixes
- Inspect and repair wiring between the transfer case control module and main computer.
FAQ
What does U0403 mean?
U0403 means that invalid data is being received from the transfer case control module, which can affect gear shifting.
How do I fix U0403?
Fixing U0403 typically involves checking and repairing any damaged wiring or replacing a malfunctioning transfer case control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0400Invalid Data Received
- U0401Invalid Data Received From ECM/PCM
- U0402Invalid Data Received From Transmission Control Module
- U0404Invalid Data Received From Gear Shift Control Module
- U0405Invalid Data Received From Cruise Control Module
- U0406Invalid Data Received From Fuel Injector Control Module
- U0407Invalid Data Received From Glow Plug Control Module
- U0408Invalid Data Received From Throttle Actuator Control Module
- U0409Invalid Data Received From Alternative Fuel Control Module
- U0410Invalid Data Received From Fuel Pump Control Module
- U0411Invalid Data Received From Drive Motor Control Module
- U0412Invalid Data Received From Battery Energy Control Module A