P28D4
Clutch B Motor Phase U-V-W Circuit/Open
P28D4 is an OBD-II diagnostic trouble code meaning: Clutch B Motor Phase U-V-W Circuit/Open. Common causes: broken wires in the u-v-w phase circuit, clutch motor fault b. Estimated repair cost: $56–167.
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
Related codes
Error P28D4 by Vehicle Brand
FAQ
What does the P28D4 code mean?
P28D4 is an OBD-II diagnostic trouble code that indicates: Clutch B Motor Phase U-V-W Circuit/Open
What causes a P28D4 error code?
The most common causes of P28D4 include: Broken wires in the U-V-W phase circuit; Clutch motor fault B; Problems with connectors or wiring harness; Control module malfunction.
How do I fix a P28D4 diagnostic trouble code?
To fix P28D4: Check the integrity of the phase circuit U-V-W. Inspect connectors and wiring harness for damage. Check operation of clutch motor B. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P28D4?
Do not drive — repair immediately
How much does it cost to fix P28D4?
The estimated repair cost for P28D4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat