P0A66

Drive Motor B Phase U Current

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–389 (est.)

Symptoms

Reduced motor power
Possible jerks during acceleration
The fault indicator lights up
Reducing electric range
Switching to limited operation mode

Causes

Inverter or power electronics fault
Problem in the motor windings (short circuit or open circuit)
Defective current sensors
Connection or wiring problems
Malfunction of the power unit control unit

How to Fix

Check connections and integrity of wiring harnesses
Diagnose the condition of the inverter
Check the resistance of the motor windings
Scan the control unit for additional errors
If necessary, replace faulty components

Related codes

P0A64 P0A65 P0A67