U0203
Lost Communication With Door Control Module E
U0203 is an OBD-II diagnostic trouble code meaning: Lost Communication With Door Control Module E. Common causes: open or short circuit in the module circuit, door control module e fault. Estimated repair cost: $33–167.
Symptoms
- Power windows on door E do not work
- Door E locks do not function
- Error on the dashboard
- Sometimes problems with mirrors (if they are controlled by this module)
- Intermittent operation of door functions
Causes
- Open or short circuit in the module circuit
- Door control module E fault
- Connector problems or contact corrosion
- Module software failures
- Problems with the car's CAN bus
How to Fix
- Check fuses associated with the module
- Inspect connectors and wiring harness for damage
- Diagnose the door control module
- If necessary, replace the control module
- Update module software (if available)
Related codes
Error U0203 by Vehicle Brand
FAQ
What does the U0203 code mean?
U0203 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Door Control Module E
What causes a U0203 error code?
The most common causes of U0203 include: Open or short circuit in the module circuit; Door control module E fault; Connector problems or contact corrosion; Module software failures.
How do I fix a U0203 diagnostic trouble code?
To fix U0203: Check fuses associated with the module. Inspect connectors and wiring harness for damage. Diagnose the door control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0203?
Limited driving only, diagnose soon
How much does it cost to fix U0203?
The estimated repair cost for U0203 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat