P0757 code meaning
Shift Solenoid B Stuck On
Powertrain system Generic code P07xx codes Check engine light
What P0757 means
A shift solenoid is an electrically switched valve in the valve body; together the solenoid states select the gear, and the module checks the result by gear ratio, slip or a pressure switch – the pattern of wrong gears shows which solenoid hangs off or on. P0757 means solenoid B is commanded off but its clutch stays applied. GM 4-speeds recognise the pattern 1-2-2-1 – third and fourth become second and first – after one trip and switch to third gear with maximum pressure; Allison checks its pressure switch after 2 s. Ford calls it 'functionally failed on' and lists it in bulletins for the 10R80 and 8F35 with mechanical causes. Note that a 2006 GM table labels this row 'stuck off' – the pattern is what counts.
P0757 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1.5 to 12 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0757
- No upshift beyond second gear, high engine speed
- Tie-up on shifts
- Limp mode
- Check engine light
Common causes of P0757
- Most likelyShift spool sticking in the applied position
- PossibleSolenoid stuck open or leaking
- PossibleClutch not releasing (burnt or stuck)
- PossibleContaminated or wrong fluid
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift solenoidTransmission valve bodyTransmission wiringTransmission control module
What each part of P0757 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| 57 | The exact fault in that area. |
What to do next
- Note P0757 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0757
What does P0757 mean?
P0757 means "Shift Solenoid B Stuck On". A shift solenoid is an electrically switched valve in the valve body; together the solenoid states select the gear, and the module checks the result by gear ratio, slip or a pressure switch – the pattern of wrong gears shows which solenoid hangs off or on. It is a generic code, so it means the same on every make.
Is it safe to drive with P0757?
Drive gently and only to a workshop. With P0757 the car can go into limp mode (reduced power) to protect itself.
Will P0757 fail an emissions test?
Yes, it can. P0757 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0757 to fix?
Difficulty: hard. A typical repair takes 1.5 to 12 hours of work. This is a job for a workshop.
Will P0757 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.