P27BD code meaning
Pressure Control Solenoid N Control Circuit/Open
Powertrain system Generic code P27xx codes Check engine light
What P27BD means
P27BD stands for an open control circuit of solenoid N. GM's 2023 Corvette dual-clutch table 23OBDG07 names the part synchronizer actuation valve 2 and tests it while its low-side output is switched off: the driver chip tries to hold the pin at a small voltage with a tiny current, which only works without a load connected. A pin voltage between about 1.7 and 3.0 V after more than 5 ms off, confirmed for 150 ms, sets the code as Type A; the check runs continuously with battery voltage between 8.75 and 18 V and is suspended by supply voltage codes P0882/P0883. Ford's 2024 list uses P27BD for open load of SPV2 on the TR9070. Broken wiring, a loose connector or an open coil are typical.
P27BD 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 P27BD
- MIL on in the same trip
- Gears on the affected shift rod blocked
- Transmission substitute mode
Common causes of P27BD
- Most likelyOpen solenoid N coil
- PossibleConnector unplugged or pushed-out terminal
- PossibleBroken control wire between TCM and solenoid
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid nWiring harness
What each part of P27BD 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. |
| BD | The exact fault in that area. |
What to do next
- Note P27BD 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 P27BD
What does P27BD mean?
P27BD means "Pressure Control Solenoid N Control Circuit/Open". P27BD stands for an open control circuit of solenoid N. It is a generic code, so it means the same on every make.
Is it safe to drive with P27BD?
Drive gently and only to a workshop. With P27BD the car can go into limp mode (reduced power) to protect itself.
Will P27BD fail an emissions test?
Yes, it can. P27BD 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 P27BD to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27BD clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.