What it means
The reporting module has lost communication with Gateway C 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 C routes messages between vehicle networks and passes information between modules. This code sets when the reporting module does not receive expected messages from Gateway C for the specified time; a gateway power or ground fault, damaged network connection, CAN bus fault, module failure, or low battery voltage can cause the loss.
Common causes
Most likely first.
- Gateway C power or ground fault
- Damaged or corroded network wiring or connectors
- CAN bus short or open circuit
- Gateway C 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 determine when Gateway C went offline and whether other modules logged communication faults at the same time.
- Check battery condition and charging-system operation because low voltage can disrupt gateway communication.
- Use the vehicle network diagram to identify which modules and features depend on Gateway C, then check whether communication loss is confined to one network.
- Inspect Gateway C connectors and accessible CAN wiring for corrosion, loose terminals, water entry, chafing, or other damage.
- With the correct wiring information, test Gateway C power and ground under load and check the relevant CAN circuits for opens, shorts, or poor connections against the manufacturer's specifications.
- If power, ground, and network wiring pass, follow the manufacturer's diagnostic procedure to assess Gateway C before replacing or configuring it.
Common fixes
- Charge or replace a weak battery and repair charging-system faults.
- Clean and secure Gateway C connectors and repair damaged terminals or wiring.
- Repair a Gateway C power or ground fault identified by testing.
- Repair a CAN bus open, short, or poor connection on the affected network.
- Replace or configure Gateway C only if testing confirms a module fault.
Can I keep driving?
Features on networks routed through Gateway C may be intermittent or unavailable, and starting or other systems can be affected. Check that essential functions work before driving, and do not drive if a safety-critical system is impaired.
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.