Drivable short-term, but fix now to avoid damage.
This code means the transmission control module detected an electrical problem in the 1-2 shift solenoid B circuit, which controls fluid flow that engages certain gears. It's often caused by a failed solenoid, dirty transmission fluid, or wiring and connector issues. Repairs usually involve testing the circuit and replacing the solenoid, and sometimes a fluid service to clear debris.
$150 – $600
Varies by vehicle and root cause.
For short trips you usually can, but it's risky. The transmission may shift harshly or drop into limp mode, and continued driving can cause more damage. Have it looked at as soon as possible.
Most repairs run between $150 and $600. A simple solenoid replacement or fluid service is on the lower end, while wiring repairs or valve body work pushes the cost higher.
It can be. Transmission shift problems can leave you stuck in one gear and, if ignored, lead to expensive internal damage. It's best treated as a priority repair.
It's an electrically controlled valve that directs transmission fluid to engage the shift from first to second gear. When it fails electrically, the transmission can't shift smoothly and sets this code.