What it means
A control module received invalid data from door control module G. The code identifies a data validity fault; the specific affected function depends on the vehicle.
How it works
Door control module G manages the door functions assigned to it and sends status messages across the vehicle network. U0506 sets when another module finds data from door control module G invalid; which physical door it serves depends on the vehicle.
Common causes
Most likely first.
- Fault in the transmitting module
- Network wiring or connector fault
- Module power or ground fault
- Software or configuration mismatch
Symptoms
- One or more functions controlled by the affected door module may not work correctly
- Related communication codes or system warnings may appear
How to diagnose it
- Record freeze-frame data and scan body and network modules to identify the reporting module and any related faults for door control module G.
- Check live data from module G while operating its assigned door controls, comparing reported states with actual lock, window, and door operation.
- Inspect module G's connector and door harness, including the hinge flex point, for loose terminals, corrosion, moisture, or damaged wires.
- Verify module G's power and ground connections using the manufacturer's procedure.
- If the connections are good, check module G's software and configuration and test the module for an internal fault.
Common fixes
- Clean and secure module G's connector.
- Repair damaged wiring in the module G door harness.
- Fix a poor power or ground connection to module G.
- Correct a software or configuration mismatch if present.
- Replace module G if diagnostic testing confirms it has failed.
Can I keep driving?
Driving may be possible if the affected doors remain secure, but functions assigned to module G may stop working or operate intermittently. Check door latching and locking before driving, and avoid relying on any affected window or lock control.
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.