P0751Powertrain
Powertrain · SAE
Shift Solenoid A Performance/Stuck Off
Meaning
The transmission control module has detected that shift solenoid A (SSA) is not delivering the expected hydraulic pressure: the solenoid is stuck in the de-energised (off) position or its performance does not match the command signal received.
Common causes
- SSA solenoid mechanically stuck in the open (off) position due to deposits or wear
- Valve body with SSA valve blocked by sediment
- Degraded or contaminated ATF impairing solenoid switching
- Clogged ATF filter reducing available pressure
- Open electrical circuit to SSA solenoid
- Internal TCM fault
Symptoms
- Check engine or transmission warning light on
- Transmission fails to upshift or downshift correctly in SSA-governed gears
- Transmission in limp mode
- Harsh or missing gear changes
- Transmission overheating
Severity
High: SSA solenoid failure causes incorrect gear selection and progressive clutch damage.
What to do
- Check ATF level and condition; replace if degraded
- Test SSA solenoid with a scan tool (commanded activation/deactivation)
- Measure SSA solenoid resistance and verify supply at the connector
- Check hydraulic pressure in the SSA circuit with a gauge
- Replace SSA solenoid or clean/overhaul the valve body