Fault Family System: Powertrain (P-Codes) 8 SAE Codes

DCT Clutch Pressure Sensor

Diagnostic & Technical Explanation

Code P28CD (Clutch A Pressure Sensor Circuit/Open) sets when the TCM sees an open, shorted, out-of-range, or implausible signal from the hydraulic pressure sensor measuring clutch A or B apply pressure inside a dual-clutch transmission's mechatronic unit. Fluid contamination fouling the sensor port, a corroded pin at the mechatronic connector, and an internally drifted sensor element are the common causes, and on many units the sensor is part of the mechatronic assembly rather than a stand-alone part.

These 8 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 8 times.

Codes in this family (8)

Code	Definition	Repair coverage
P28CD	Clutch A Pressure Sensor Circuit/Open	3 ranked fixes
P28CE	Clutch A Pressure Sensor Circuit Low	3 ranked fixes
P28CF	Clutch A Pressure Sensor Circuit High	3 ranked fixes
P28D0	Clutch A Pressure Sensor Circuit Range/Performance	3 ranked fixes
P28DC	Clutch B Pressure Sensor Circuit/Open	3 ranked fixes
P28DD	Clutch B Pressure Sensor Circuit Low	3 ranked fixes
P28DE	Clutch B Pressure Sensor Circuit High	3 ranked fixes
P28DF	Clutch B Pressure 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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