Error code
OBD2 U0203
OBD2U0203
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Lost Communication With 'Door Control Module E'.
Severity
moderateCan continue driving, but may experience issues with door functions.
Summary
U0203 indicates lost communication with the Door Control Module E, which is part of the data bus system responsible for door functions.
Common Causes
- Faulty or damaged wiring between the vehicle's main computer and the Door Control Module E
- Failed Door Control Module E
Fixes
FAQ
How can I diagnose U0203?
Consult a professional mechanic to check the wiring and Door Control Module E for any faults or damage.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0200Lost Communication With 'Door Control Module B'
- U0201Lost Communication With 'Door Control Module C'
- U0202Lost Communication With 'Door Control Module D'
- U0204Lost Communication With 'Door Control Module F'
- U0205Lost Communication With 'Door Control Module G'
- U0206Lost Communication With Folding Top Control Module
- U0207Lost Communication With Moveable Roof Control Module
- U0208Lost Communication With 'Seat Control Module A'
- U0209Lost Communication With 'Seat Control Module B'
- U0210Lost Communication With 'Seat Control Module C'
- U0211Lost Communication With 'Seat Control Module D'
- U0212Lost Communication With Steering Column Control Module