P0757: Shift Solenoid B Stuck On
What to do
Expect missing gears rather than a total failure. Which gears you still have is the key detail to report.
What this code means
Shift solenoid B remains applied when it should release. The gears requiring it to be off become unavailable, and the transmission settles into whatever combinations it can still achieve.
Mechanical sticking is far more common than an electrical fault holding it on, which puts fluid condition and valve body wear ahead of wiring in the order of investigation. A valve seized in a bore worn oval by years of service is the classic version, and it is a valve body repair rather than a transmission one.
Likely causes
Start here
- Stuck valve in the valve body · specialist
- Debris in the transmission fluid · moderate
- Failed shift solenoid · moderate
Less common
- Wiring shorted to ground · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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