What it means
A control module received invalid data from hybrid/EV battery interface control module C. 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 C supplies battery-related data to other modules. This code sets when a receiving module judges data from interface module C invalid; it does not alone establish a fault in a particular battery cell or the whole pack.
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
- Save freeze-frame data and scan all modules for battery and communication codes, noting which module rejected data from interface module C.
- Check available live data from interface module C for missing or implausible values and compare related readings from other battery interface modules.
- Leave high-voltage parts untouched and inspect accessible low-voltage connectors and wiring for interface module C for corrosion, damage, or loose connections.
- Have the low-voltage power and ground supply and network connections for module C checked under the manufacturer's safety procedure.
- If the circuits pass, investigate module C software or configuration and follow manufacturer guidance for additional battery-system checks.
Common fixes
- Repair damaged or poorly seated accessible low-voltage wiring or connectors for interface module C.
- Restore a faulty low-voltage power or ground connection to module C.
- Correct a software or configuration mismatch using the manufacturer's procedure.
- Repair or replace interface module C if it continues to provide invalid data after circuit checks.
Can I keep driving?
Do not continue driving if a battery warning, reduced power, or a stop-vehicle message appears; follow the vehicle's instructions and stop safely. Avoid high-voltage components and arrange prompt diagnosis because battery performance may be limited.
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.