Door Control Module C Data Fault
The control module that manages communication (typically the BCM or gateway) has detected that data received from the Door Control Module C is invalid, out of range, or fails integrity checks (checksum/CRC). This indicates data corruption on the CAN/LIN bus or an internal processor failure in the transmitting module.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Internal failure of Door Control Module C (corrupted hardware or firmware)
- Communication errors on the CAN/LIN bus: open circuit, short to ground/battery, or EMI interference
- Loose, corroded, or damaged connectors at the door module or gateway/BCM
- Software/calibration mismatch between modules (parameter incompatibility)
- Low battery voltage or voltage spikes corrupting transmission
3. Symptoms You Will Notice
- Door-related features (windows, locks, mirrors) may be inoperative or intermittent
- Warning lights or messages related to door systems on the dashboard
4. Step-by-Step Diagnosis
Scan all modules for related codes and check communication status
Inspect wiring and connectors at Door Control Module C and gateway/BCM for damage or corrosion
Test battery voltage and charging system; check for voltage fluctuations
Verify software versions and perform module reprogramming if mismatch is found
If wiring and voltage are OK, replace Door Control Module C
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but door-related functions may not work properly. Have it diagnosed soon to avoid further issues.
How much does it cost to fix?▼
Diagnosis typically $100-$200. Repair costs range from $200 for a connector repair to $800+ for module replacement and programming.