Shift Solenoid B Malfunction
There's a problem with the shift solenoid B in the transmission.
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)
The computer is getting signals that solenoid B is not operating correctly, which helps control the movement of the gears in the transmission.
What the computer is actually seeing
The PCM expects a certain resistance (usually around 10-30 ohms) from the shift solenoid B circuit. If the resistance is too high, too low, or if the solenoid is stuck, the code triggers.
What a healthy reading looks like
Resistance from solenoid B should be 10-30 ohms, and the voltage drop should be between 10-14 volts during operation.
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.
- 11. Check the transmission fluid level and quality. Add fluid or replace if dirty.
- 22. Visually inspect the wiring and connectors for solenoid B (usually in the valve body area). Repair any damage found.
- 33. Measure the resistance of solenoid B. Disconnect the connector and measure across the terminals. If resistance is not within 10-30 ohms, replace the solenoid.
- 44. Check voltage at the solenoid connector with the engine running. You should see 10-14 volts. If not, trace the wiring back to the PCM for issues.
- 55. If solenoid B tests good and wiring is intact, consider checking the PCM for faults.
Common causes
- Faulty shift solenoid B
- Wiring issues (shorts or opens) in the solenoid circuit
- Bad PCM (Powertrain Control Module)
- Dirty transmission fluid or low fluid level
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but shifting may be erratic and it could affect driveability, so fix it soon.
Will this code come back after I fix the solenoid?
It may come back if there's an underlying wiring problem or issue with the PCM.
Why does this code sometimes pair with others?
Multiple solenoid codes can trigger together if there's a common fault in the wiring or a shared controller issue.
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