Drivable short-term, but fix now to avoid damage.
P0750 means shift solenoid 'A' in the transmission has an electrical fault or isn't working correctly. Shift solenoids control the flow of fluid that engages each gear, so a bad one disrupts shifting. This often results in hard shifts or the transmission being stuck in a particular gear.
$150 – $1000
Varies by vehicle and root cause.
Briefly, yes, but not for long. A bad shift solenoid can leave you stuck in one gear or in limp mode, which is hard on the transmission, so get it to a shop soon.
Replacing a shift solenoid typically costs $150-$500, but if it's mounted inside and the pan or valve body must come off, it can reach $600-$1,000.
It's a high-severity code because it affects how the transmission shifts. Left alone, the rough shifting and limp mode can accelerate wear on internal components.
It's a small electrically controlled valve that directs transmission fluid to engage a gear. When it fails, the transmission can't shift into or out of that gear properly.