What it means
Communication with Door Control Module C was not received as expected. The code does not identify which door or functions that module controls.
At a glance
- Usually lights the warning light of the system that lost communication
How it works
Door Control Module C operates or reports functions for a door assigned to that module; the code does not specify which door or features. This code sets when the expected network messages from Module C are missing, so the fault is in communication or module availability rather than identifying a particular door component.
Common causes
Most likely first.
- Module unpowered
- Gateway module routing CAN messages incorrectly
- CAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
How to diagnose it
- Record all module codes and freeze-frame data, noting whether other modules also report network communication loss.
- Use a compatible scan tool to check whether Door Control Module C responds and whether its status messages are present.
- Inspect Module C’s power, ground, connector, and wiring, including the flexible harness at the relevant door, for damage, corrosion, looseness, or water entry.
- Check the network branch wiring and connector terminals for opens, shorts, or poor contact.
- If Module C has sound power and wiring, have gateway routing and CAN termination tested against the manufacturer’s specification.
Common fixes
- Clean and secure Module C’s power, ground, or connector connection.
- Repair broken door-jamb wiring or damaged network connector terminals on Module C’s branch.
- Correct a confirmed gateway routing or configuration fault.
- Repair or replace a CAN terminating resistor if testing finds it outside the manufacturer’s specification.
Can I keep driving?
Before driving, confirm that the affected door latches securely and that essential functions such as locks and visibility-related windows work. Do not drive if the door cannot be secured or an inoperative function creates a safety risk.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.