P0975 Shift Solenoid B Control Circuit Range/Performance

P0975 indicates shift solenoid B control circuit range/performance. The solenoid B circuit or response does not match the commanded shift strategy.

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 diagnose a solenoid B performance code from static resistance alone; compare command, circuit response, and ratio data.

Symptoms of P0975

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 P0975

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, circuit state, shift timing, actual gear ratio, input speed, output speed, and fluid temperature.
Inspect internal harness routing, case connector pins, solenoid resistance, connector fluid intrusion, and voltage supply under load.
Review companion ratio, pressure, and shift solenoid codes to decide whether the fault is electrical, hydraulic, or mechanical.

Related OBD-II codes

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