Drivable short-term, but fix now to avoid damage.
This code indicates an electrical problem in the pressure control solenoid circuit, such as an open, short, or out-of-range resistance, rather than a purely mechanical fault. The transmission computer detects the bad signal and often limits operation to protect the unit. Typical repairs involve checking and fixing wiring and connectors, and replacing the solenoid if its internal electrical winding has failed.
$150 – $850
Varies by vehicle and root cause.
For short distances, usually yes, but don't rely on it. An electrical fault can cause erratic shifting or limp mode at any time. Have the circuit checked promptly so a small wiring issue doesn't turn into a bigger transmission problem.
If it's a wiring or connector repair, you might spend $150 to $350. If the solenoid itself has failed electrically, expect roughly $400 to $850 with labor, depending on access to the solenoid.
It can be, because it disrupts the computer's ability to control transmission pressure. Sometimes it's just a loose connector, but left unchecked it can lead to harsh shifting and internal wear. It's best diagnosed sooner rather than later.
P0749 specifically points to an electrical issue in the solenoid circuit, like a short or open, while P0746 is a broader malfunction that can be mechanical or performance-related. P0749 usually starts with wiring and connector checks.