P28D4

Clutch B Motor Phase U-V-W Circuit/Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Gear shifting problems
Check Engine light comes on
Reduced vehicle dynamics
Jerks when shifting gears
Transmission of the gearbox into emergency mode

Causes

Broken wires in the U-V-W phase circuit
Clutch motor fault B
Problems with connectors or wiring harness
Control module malfunction
Short circuit in the circuit

How to Fix

Check the integrity of the phase circuit U-V-W
Inspect connectors and wiring harness for damage
Check operation of clutch motor B
Diagnose the control module
Replace faulty components

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