Pressure Control Solenoid 'B' Range/Performance Problem
There’s an issue with the transmission’s pressure control solenoid B.
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 transmission pressure control solenoid B helps manage the hydraulic pressure in the transmission. If it fails, the transmission can shift poorly or overheat.
What the computer is actually seeing
The transmission control module (TCM) monitors the electrical signals and pressure readings from the transmission solenoid. An abnormal voltage (typically above 0.2 volts or below 4.5 volts) or incorrect pressure readings lead to this fault code.
What a healthy reading looks like
Expected voltage at the solenoid connector should be around 5 volts with proper operation. Pressure readings in the valve body should match manufacturer specifications (usually 65-150 PSI 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. If low, add fluid and retest. Decision: If code returns, proceed; if not, issue resolved.
- 22. Inspect the wiring and connector to pressure control solenoid B for damage or corrosion. Decision: If damaged, repair/replace and retest; if not, proceed.
- 33. Test the voltage at the solenoid connector while the engine is running. You should see around 5 volts. Decision: If the voltage is off, check the TCM; if correct, proceed.
- 44. Perform a pressure test on the transmission system to ensure it meets manufacturer specifications. Decision: If pressure is low, inspect for internal leaks; if pressure is okay, replace the solenoid B.
Common causes
- Faulty transmission pressure control solenoid B
- Wiring issues or corroded connectors
- Low transmission fluid level
- Stuck or damaged valve body
- Faulty transmission control module (TCM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not ideal. The transmission may shift poorly, leading to drivability issues. Fix soon.
Will this code come back after clearing?
If the root cause is not fixed, it likely will return.
Why does this code appear with other transmission codes?
Many transmission issues are interconnected; faults in one part can trigger multiple codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →