Drivable short-term, but fix now to avoid damage.
This code points to an electrical problem in the shift solenoid A circuit, which on many vehicles handles the 1-2 gear shift, such as an open, short, or out-of-range resistance. The transmission computer flags the faulty signal and often limits shifting to protect the unit. Typical fixes include inspecting and repairing wiring and connectors, and replacing the solenoid if its electrical coil has failed.
$150 – $800
Varies by vehicle and root cause.
For short trips, usually yes, but it isn't ideal. An electrical fault can cause rough shifting or limp mode without warning. Have the circuit inspected promptly so a minor wiring problem doesn't grow into a bigger transmission issue.
A wiring or connector repair might cost $150 to $350, while replacing the shift solenoid usually runs $300 to $800 with labor. Pricing depends on whether the solenoid is standalone or part of a solenoid pack.
It deserves attention because it affects how the transmission shifts, often the 1-2 change. Sometimes it's only a connector, but ignoring it can lead to harsh shifting and added wear. It's best diagnosed promptly.
On many vehicles, yes. Shift solenoid A commonly controls the 1-2 gear change, so an electrical fault here often shows up as a harsh or missing shift between first and second gear until the circuit is repaired.