Shift Solenoid B Performance or Stuck Off
This code means the transmission's shift solenoid B is not working properly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside your car's transmission, shift solenoids control when to change gears. If the computer sees that solenoid B isn't activating when it should, it sets this code, which might make your car have trouble shifting smoothly or even get stuck in a gear.
What the computer is actually seeing
The transmission control module (TCM) monitors the voltage and resistance of the shift solenoids. With an expected resistance of around 10-20 ohms, if solenoid B shows a resistance outside this range or the voltage signal is below 1V when it should be activating, the DTC triggers.
What a healthy reading looks like
Shift solenoid B should show a resistance of 10-20 ohms; voltage should be around 12V when activated.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the transmission fluid level; it should be at the correct level and clean.
- 2Inspect wiring and connectors to shift solenoid B for damage or corrosion; repair as needed.
- 3Test the resistance of shift solenoid B; it should be between 10-20 ohms.
- 4Using a scan tool, monitor the voltage at the shift solenoid connector with the ignition on; should be 12V when commanded on. If not, suspect TCM or wiring issues.
- 5If all tests are normal, consider replacing shift solenoid B.
Common causes
- Faulty shift solenoid B
- Wiring issues to the solenoid
- Faulty transmission control module (TCM)
- Low transmission fluid
- Clogged transmission filter
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances as shifting issues can impact drivability and increase wear on the transmission.
Will this code come back after fixing?
If the root cause is properly fixed, the code shouldn't return.
Why does this code appear with other codes?
Multiple shift solenoid codes may indicate a systemic issue in the transmission control system.
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