What it means
A control module received data from Battery Energy Control Module B that it judged invalid or implausible. This code identifies the rejected data, but does not by itself identify the cause.
How it works
Battery Energy Control Module B monitors the high-voltage battery and reports battery status and control information to other modules. U0413 sets when a receiving module judges information from this specific battery control module invalid or implausible; it does not establish whether the sender, its inputs, or the network caused the problem.
Common causes
Most likely first.
- Fault or implausible input at Battery Energy Control Module B
- Damaged or loose network wiring or connector
- Module power, ground, or programming issue
Symptoms
- Hybrid or EV warning message
- Battery or related functions may be limited
- Other communication codes
How to diagnose it
- Scan all modules and save freeze-frame and communication data before clearing codes to see which module rejected Battery Energy Control Module B data and what other faults were present.
- Check battery and hybrid system live data for values reported by Module B that are missing, erratic, or inconsistent with other battery readings.
- With the vehicle powered down as specified by the manufacturer, inspect Module B's accessible connectors and network wiring for looseness, corrosion, moisture, or damage; do not disturb high-voltage components.
- Check for related sensor or battery faults stored by Battery Energy Control Module B, since an implausible input there can make its transmitted data unreliable.
- If wiring and input faults are not found, test the module's power, ground, and network circuits to the manufacturer's specification, then check for applicable programming or module faults.
Common fixes
- Secure or repair a loose, corroded, or damaged Module B connector or network wire.
- Repair the battery sensor or input fault identified in Module B's own codes and live data.
- Restore the module's power or ground connection if testing finds a fault.
- Apply the correct module software update or replace the module only if circuit and input tests support it.
Can I keep driving?
Because battery management may be limited, follow any hybrid or EV warning and stop safely if the vehicle reports a battery fault, reduced power, or overheating. Avoid relying on the vehicle for a long trip until the warning and related codes are diagnosed.
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.