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U0504 — Invalid Data Received From Door Control Module E

Generic OBD-II · all makesNetwork / communication

U0504 indicates that the vehicle's network received invalid data from the Door Control Module E, meaning the communication between the door module and other control units is suspect. This code is logged when the receiving module detects messages that do not conform to expected format or content.

Symptoms

What causes it — most likely first

1. Faulty Door Control Module E

The Door Control Module itself can develop internal faults that transmit corrupted or out‑of‑spec data, triggering the invalid data condition.

2. Wiring or connector problems at the Door Control Module

Corroded, loose, or damaged wiring and connectors can alter signal integrity, causing the receiving module to interpret messages as invalid.

3. CAN bus network issues affecting message reception

A fault anywhere on the CAN bus (e.g., short, high resistance, or termination problem) can corrupt messages traveling to the receiving module.

4. Body Control Module (BCM) sending erroneous data

If the BCM or another module transmits data that does not meet protocol specifications, the Door Control Module may flag it as invalid.

5. Powertrain Control Module (PCM) communication error

A PCM malfunction can cause it to send improper CAN messages, but this is uncommon for U0504 and is considered only after other causes are ruled out.

How it's diagnosed

  1. Retrieve all stored and pending DTCs to identify any related to door, lock, or CAN bus systems.
  2. Visually inspect the wiring harness and connectors for the Door Control Module E for signs of corrosion, damage, or looseness.
  3. Monitor live CAN bus data for Door Control Module E messages to detect abnormal or corrupted frames.
  4. Test door lock, power lock, and keyless entry functions while observing for intermittent failures.
  5. Perform continuity and resistance checks on the CAN bus lines to verify proper termination and signal integrity.
  6. If all other possibilities are eliminated, consider module replacement only after confirming the fault is isolated to the component.

Code facts & related codes

SystemNetwork / communication
StandardizationSAE generic — identical on every make
Related codesU0501 — Invalid Data Received From Door ControU0502 — Invalid Data Received From Door ControU0503 — Invalid Data Received From Door ControU0505 — Invalid Data Received From Door ControU0506 — Invalid Data Received From Door ControU0507 — Invalid Data Received From Folding Top

Frequently asked

Do I need to replace the Powertrain Control Module to clear U0504?

No. The PCM is rarely the cause of this code; the issue is usually the Door Control Module, its wiring, or a CAN bus problem.

Can a simple wiring repair fix the code?

Yes. In many cases, repairing a corroded connector or replacing a damaged wire segment resolves the invalid data condition.

Is the Door Control Module always replaceable?

Not always. The module may be functional but affected by external factors such as wiring faults or CAN bus errors, so diagnosis should precede replacement.

Will clearing the code without repairs clear the problem permanently?

No. If the underlying cause (e.g., wiring or module fault) is not corrected, the code will reappear after a drive cycle or after the vehicle’s power is restored.