U04BF

Invalid Data Received from Drive Motor A Clutch Actuator

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

The Check Engine light comes on
Transmission transition to emergency mode
Loss of power during acceleration
Jerks when shifting gears
Unstable operation of the hybrid system

Causes

Engine A clutch actuator malfunction
Open or short circuit in the CAN bus
Poor contact in control circuit connectors
Wiring harness damage
Control unit software error

How to Fix

Check the condition of the clutch connectors and wiring
Scan the CAN bus for communication errors
Check the resistance of the clutch drive windings
Update control unit software
Replace the clutch drive if necessary

Related codes

U04BE U04C0 U04BD