P0BF4

Drive Motor B Phase U Current Sensor Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Reduced motor power
Switching to emergency mode
Unstable engine operation
Check Engine Light Illuminates

Causes

Phase U current sensor fault
Open or short circuit in the sensor circuit
Poor contact in connectors
Problems with the ECU

How to Fix

Check the integrity of the sensor circuit
Inspect connectors for corrosion or damage
Check sensor resistance
Scan the ECU for additional errors
Replace current sensor if necessary

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