U0503
Invalid Data Received From Door Control Module D
U0503 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Door Control Module D. Common causes: door control module malfunction, open or short circuit in the communication circuit. Estimated repair cost: $33–167.
Symptoms
- Power windows don't work
- Central locking does not function
- The malfunction indicator on the instrument panel is on
- Problems with mirrors (if controlled via the door module)
- Errors in other systems related to the door module
Causes
- Door control module malfunction
- Open or short circuit in the communication circuit
- Poor contact in connectors
- Module power problems
- Software error in the module
How to Fix
- Check the power and ground of the door module
- Inspect connectors and wiring harness for damage
- Scan the door module for additional errors
- Check the functionality of the door module
- Update or reflash module software
Related codes
Error U0503 by Vehicle Brand
FAQ
What does the U0503 code mean?
U0503 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Door Control Module D
What causes a U0503 error code?
The most common causes of U0503 include: Door control module malfunction; Open or short circuit in the communication circuit; Poor contact in connectors; Module power problems.
How do I fix a U0503 diagnostic trouble code?
To fix U0503: Check the power and ground of the door module. Inspect connectors and wiring harness for damage. Scan the door module for additional errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0503?
Yes, but get it checked soon
How much does it cost to fix U0503?
The estimated repair cost for U0503 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat