Drivable short-term, but fix now to avoid damage.
P0780 is a general shift malfunction code, meaning the transmission control module detected that a commanded gear change didn't happen correctly. It often appears alongside more specific solenoid or gear-ratio codes. The result is poor or unpredictable shifting that should be diagnosed before it gets worse.
$150 – $2500
Varies by vehicle and root cause.
Only carefully and not for long. The transmission isn't shifting reliably, so driving it can cause more wear or leave you stuck in gear. Get it to a shop before relying on it daily.
A solenoid or fluid repair may be $150-$600, but if internal clutches or the valve body are involved, the cost can climb toward $1,500-$2,500 or more.
Yes, it's high severity. A general shift malfunction means the transmission isn't doing its job correctly, and ignoring it can lead to expensive internal damage.
P0780 is a broad shift-fault code, so the computer usually stores more specific codes (like a solenoid or gear-ratio code) that pinpoint the real cause. Those help the technician fix the underlying problem.