P0757 Shift Solenoid B Stuck On

P0757 indicates shift solenoid B is stuck on. The transmission behavior suggests solenoid B remains applied when release is expected.

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 the transmission for a stuck-on solenoid code before checking fluid contamination and solenoid/valve-body operation.

Symptoms of P0757

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 P0757

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

Monitor solenoid B command, actual gear, calculated ratio, input and output speeds, and pressure data during the affected shift.
Check for valve-body sticking, debris, contaminated fluid, solenoid mechanical sticking, or wiring shorts.
Use companion ratio or shift codes to narrow which hydraulic path is affected.

Related OBD-II codes

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