What it means
A control module received invalid data from hybrid/EV battery interface control module G. The code identifies a data validity fault; the specific affected function depends on the vehicle.
At a glance
- Usually lights the warning light of the system that lost communication
- The engine or gearbox may go into limp mode
How it works
Hybrid/EV battery interface control module G reports battery-related information to other vehicle modules. This code sets when a receiving module judges data from interface module G invalid; it does not alone confirm a battery pack failure or a fault in modules A through F.
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
- Hybrid or EV battery warnings may appear
- Battery or vehicle performance may be limited
How to diagnose it
- Record freeze-frame data and scan all modules for battery and communication codes, identifying the receiver that flagged data from interface module G.
- Review available live data from module G and compare related values with readings from other battery interface modules for missing or implausible data.
- Leave high-voltage equipment untouched and inspect accessible low-voltage connectors and harnesses for module G for damage, corrosion, or poor seating.
- Have module G's low-voltage power, ground, and network connections tested under the manufacturer's safety procedure.
- If these circuits are sound, check software or configuration for module G and follow manufacturer guidance for further diagnosis.
Common fixes
- Repair damaged, corroded, or loose accessible low-voltage wiring or connectors for interface module G.
- Restore a faulty low-voltage power or ground connection to module G.
- Correct a software or configuration mismatch using the manufacturer's procedure.
- Repair or replace interface module G if testing confirms it is providing invalid data.
Can I keep driving?
If a battery warning, power limitation, or stop-vehicle alert appears, stop safely and follow the vehicle's instructions; do not continue if propulsion is restricted. Avoid high-voltage components and arrange prompt diagnosis.
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.