P28C6Clutch A Motor Phase U-V-W Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P28C6 is the general circuit code for the three-phase supply of the clutch A motor and is set above all when a phase carries no current although the controller drives it, i.e. an open line. A brushless motor needs all three windings to produce torque; with one missing it stalls or runs roughly, and the gerotor pump behind it can no longer build the oil pressure that engages clutch A. Getrag fitted such ferrite motors as common parts for clutch actuation and shift drums in its pump-actuated DCT family. Typical faults are a backed-out terminal, a cracked solder joint in the actuator, or a broken wire near a moving bracket. P28C4/P28C5 instead describe a voltage pulled low or high. No manufacturer documents P28C6 publicly with values.
- What you may notice
- Clutch A does not engage, affected gears unavailable
- Transmission warning and possibly MIL
- Fault may come and go with vibration or temperature
- Likely causes
- LikelyTerminal pushed back or loose in the clutch A motor connector
- PossibleCracked solder joint or winding connection inside the actuator
- PossiblePhase wire broken at a bend or bracket
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.