Powertrain, generic (extended)

P27DB Pressure Control Solenoid T Electrical

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P27DB is a catch-all for electrical trouble on solenoid T that does not name the kind of fault. No manufacturer publishes it. The only known valve T is the selector pilot valve of Ford's TR9070 dual-clutch gearbox, and Ford's 2024 overview splits that valve's wiring faults into P27DD for open load, P27DF for a shorted switch and P27E0 for a shorted load instead of using this code. GM's Corvette has a comparable pilot valve but numbers it under the K block (P282D to P2830). CARB 13 CCR 1968.2 demands circuit monitoring of transmission actuators in general. Diagnosis follows the detailed codes: coil ohms, connector pins, harness insulation, then the TCM.

Likely causes

Solenoid T coil open or shorted
Corrosion or poor fit at the gearbox connector
Defective TCM output for solenoid T

Symptoms

  • MIL on
  • Restricted gear choice
  • Limp mode possible

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 ttcmwiring harness

Related codes

P27DCP27DDP27DFP27E0P282B

References: law.cornell.edu, fordservicecontent.com.