P0771 Shift Solenoid E Performance or Stuck Off

P0771 indicates shift solenoid E performance or stuck-off behavior. The commanded solenoid response did not match expected gear or pressure behavior.

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 assume this is only an electrical solenoid problem; performance faults can be hydraulic or fluid related.

Symptoms of P0771

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 P0771

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

Compare solenoid E command with actual gear ratio, shift timing, input speed, output speed, and pressure-control data.
Inspect fluid contamination, valve-body sticking, solenoid response, wiring, and connector condition.
Review the temperature, load, and shift event where the code set to isolate repeatable conditions.

Related OBD-II codes

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