P27BDPressure Control Solenoid N Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- MIL on in the same trip
- Gears on the affected shift rod blocked
- Transmission substitute mode
- Likely causes
- LikelyOpen solenoid N coil
- PossibleConnector unplugged or pushed-out terminal
- PossibleBroken control wire between TCM and solenoid
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.