Drivable short-term, but fix now to avoid damage.
This code means the transmission computer detected an on-and-off problem with shift solenoid C, so the fault comes and goes rather than staying constant. It's often caused by a loose or corroded connector, intermittent wiring, or a solenoid that's beginning to fail. Repairs usually start with inspecting connectors and wiring, then testing or replacing the solenoid, and intermittent issues are typically fixable without a rebuild.
$150 – $600
Varies by vehicle and root cause.
Short trips are usually okay, but the unpredictable shifting can catch you off guard in traffic. It's best to have it diagnosed soon before the fault becomes constant.
Repairs typically range from $150 to $600. Cleaning or repairing a connector is cheaper, while replacing the solenoid costs more depending on the vehicle.
It's worth prompt attention. Even an intermittent shifting fault affects safety and tends to get worse, so don't ignore it just because it isn't constant.
Because the fault is intermittent, it may not be present when the car is tested. Technicians often have to inspect wiring and connectors carefully or recreate the conditions to catch it.