What it means
The reporting module has lost communication with Gateway D on the vehicle network. It sets this code when expected messages from that gateway are not received for a specified time.
How it works
Gateway D routes messages between vehicle networks so connected modules can share information. This code sets when the reporting module stops receiving expected messages from Gateway D for the specified time; possible causes include lost power or ground, damaged CAN wiring, a gateway fault, or low battery voltage.
Common causes
Most likely first.
- Gateway D power or ground fault
- Damaged or corroded network wiring or connectors
- CAN bus short or open circuit
- Gateway D module failure
- Low battery voltage
Symptoms
- Intermittent or inoperative vehicle features
- Warning lights or messages
- Other communication codes
- Difficulty starting or operating some systems
How to diagnose it
- Scan all modules and review freeze-frame data to find when Gateway D communication was lost and which other modules logged related codes.
- Check battery condition and charging-system operation to rule out a low-voltage event affecting Gateway D or other modules.
- Use the vehicle's network diagram to identify which networks and functions rely on Gateway D, then see whether the communication loss is limited to those areas.
- Inspect Gateway D connectors and accessible CAN wiring for corrosion, loose terminals, water entry, chafing, or damage.
- Test Gateway D power and ground under load and check the relevant network circuits for opens, shorts, or poor connections using the manufacturer's specifications.
- If supply and network tests pass, follow the manufacturer's procedure to determine whether Gateway D has failed before replacing or configuring it.
Common fixes
- Charge or replace a weak battery and correct a charging-system fault.
- Clean and secure Gateway D connectors and repair damaged wiring or terminals.
- Repair a Gateway D power or ground fault found during testing.
- Repair an open, short, or poor connection in the affected CAN network.
- Replace or configure Gateway D only after the diagnostic procedure confirms a gateway fault.
Can I keep driving?
A loss of Gateway D messages can disable features or affect starting on networks it routes. Verify that essential systems work before driving, and stop if braking, lighting, or another safety-related function is affected.
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.