P27BD: Pressure Control Solenoid N Control Circuit / Open

The control line to pressure control solenoid N is open.

Medium severity. Can I keep driving?Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.

In automatic transmissions, solenoid valves direct the fluid to select gears and regulate pressures. This code indicates a fault in one of them or in its circuit.

Most likely causes

Open solenoid coil
Broken control wire

What to check, in order

Start with the simplest. You can tick off each step.

Check the fluid level and condition according to the manufacturer
Check the continuity of the wire between the component and the control module.
Check the transmission connector
Read the data with a transmission-compatible scanner
Measure the solenoid valve circuit
Leave opening the transmission to a specialized repair shop

Good to know

Repair difficulty: hard

What each character of P27BD means

P: Powertrain: engine and transmission
2: Generic code: same on every make
7: Transmission
BD: Specific fault in that system

Frequently asked questions

Can I keep driving with code P27BD?

Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.

What causes code P27BD?

The most common causes are: open solenoid coil; broken control wire.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.