U064B

Lost Communication With Hybrid/EV Battery Pack Current Sensor B

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Switching to emergency mode
Battery cannot be charged
Error message on the instrument panel

Causes

Open or short circuit in the sensor circuit
Current sensor B fault
Connector problems or contact corrosion
Hybrid ECU malfunction
Wiring harness damage

How to Fix

Check continuity of current sensor B circuit
Check connections and connector contacts
Test current sensor B
Check the power supply and ground of the sensor
Scan the ECU for additional errors
Repair only from an authorized dealer

Related codes

U064A U064C U064D