P27DD code meaning
Pressure Control Solenoid T Control Circuit/Open
Powertrain system Generic code P27xx codes Check engine light
What P27DD means
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.
P27DD at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P27DD
- MIL on
- Only some gears selectable
- Fallback mode
Common causes of P27DD
- Most likelyDisplaced terminal in the connector
- PossibleBroken lead to solenoid T
- PossibleBurnt-through winding of solenoid T
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid tWiring harness
What each part of P27DD means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| DD | The exact fault in that area. |
What to do next
- Note P27DD and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P27DD
What does P27DD mean?
P27DD means "Pressure Control Solenoid T Control Circuit/Open". P27DD tells that the control circuit of solenoid T is open, so no current reaches the coil. It is a generic code, so it means the same on every make.
Is it safe to drive with P27DD?
Drive gently and only to a workshop. With P27DD the car can go into limp mode (reduced power) to protect itself.
Will P27DD fail an emissions test?
Yes, it can. P27DD is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P27DD to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27DD clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.