Powertrain, generic (extended)

P27DD Pressure Control Solenoid T Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P27DD tells that the control circuit of solenoid T is open, so no current reaches the coil. Ford's 2024 OBD overview gives this code to open load on the selector pilot valve of the TR9070 dual-clutch transmission; the document lists the fault type only, without limits. How such a test usually works is shown by GM for the corresponding pilot valve of the Corvette, there coded P282D: with the output off, a sense voltage stuck in the 1.7 to 3.0 V window for 100 ms reveals the missing load (23OBDG07). A dead pilot valve leaves the selector in its rest position, so the synchronizer valves can only reach one group of rods. A displaced terminal, a broken lead or a burnt winding are the usual finds.

Likely causes

Displaced terminal in the connector
Broken lead to solenoid T
Burnt-through winding of solenoid T

Symptoms

  • MIL on
  • Only some gears selectable
  • Fallback mode

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid twiring harness

Related codes

P27DFP27E0P27DEP27DBP282D

References: law.cornell.edu, fordservicecontent.com, gsi.ext.gm.com.