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TuningBot DTC Database · v4.37.15

U0503 Invalid Data Received From Door Control Module D

Generic (OBD-II) interpretation in the TuningBot DTC database.

U · NetworkNetworkOBD2

What U0503 means

U0503
Invalid Data Received From Door Control Module D Generic · network Data confidence 65%

The control module registered the fault condition described as "Invalid Data Received From Door Control Module D".

Symptoms

  • Multiple warning lamps possible
  • Functions of the affected module unavailable

Possible causes

  • CAN bus wiring fault (open, short, chafed harness)
  • Faulty control module loading the bus
  • Connector or terminal corrosion
  • Power supply or ground fault of a module

Recommended checks

  • Perform a full-module scan to map which modules communicate
  • Check CAN bus resistance and voltages at the diagnostic connector
  • Inspect wiring and connectors of the affected module
  • Check module power supply and grounds
  • Disconnect suspect modules one at a time only with a documented procedure

Related and nearby codes

U05 range
U0501U0502U0504U0505U0506U0507U0508U0509U050AU050BU050CU050DU050EU0511U0512U0513U0514U0515

How to read U0503

U

Network: communication between control units.

0

Generic SAE-standard code: same meaning on every make.

503

Specific fault index within the subsystem.

Frequently asked questions about U0503

What does U0503 mean?

Invalid Data Received From Door Control Module D. The control module registered the fault condition described as "Invalid Data Received From Door Control Module D".

Is U0503 generic or manufacturer-specific?

U0503 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U0503 at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U0503 is removable in your case.

Other file services

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