P0775 Pressure Control Solenoid B Malfunction

P0775 points to pressure control solenoid B malfunction. The transmission controller detected a problem controlling hydraulic pressure through that solenoid.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace clutches or the transmission assembly before checking pressure-control command, solenoid circuit, and fluid condition.

Symptoms of P0775

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0775

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Review commanded line pressure, pressure control solenoid B command, shift feel, slip data, and ratio codes.
Check fluid level and condition, solenoid wiring, internal harness, case connector, and pressure-control related codes.
Determine whether symptoms are harsh shifts, slipping, delayed engagement, or limp mode.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.