Fault Family System: Powertrain (P-Codes) 4 SAE Codes

DCT Clutch Motor Position Sensor

Diagnostic & Technical Explanation

Code P28CB (Clutch A Motor Position Sensor Circuit/Open) sets when the TCM sees an open, shorted, or implausible signal from the rotor position sensor inside a clutch actuator motor, which the driver electronics need to commutate the brushless motor and infer clutch apply position. A failed sensor makes the motor run rough or not at all, so the usual suspects are the sensor's connector at the actuator, debris on the sensor's magnetic target, and an internally failed sensor requiring actuator replacement.

These 4 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 4 times.

Codes in this family (4)

Code	Definition	Repair coverage
P28CB	Clutch A Motor Position Sensor Circuit/Open	3 ranked fixes
P28CC	Clutch A Motor Position Sensor Circuit Range/Performance	3 ranked fixes
P28DA	Clutch B Motor Position Sensor Circuit/Open	3 ranked fixes
P28DB	Clutch B Motor Position Sensor Circuit Range/Performance	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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