Check this first
This code is only a pointer – the shop needs to read the transmission computer for the real code.
What usually fixes it
In the order a good shop checks them. Typical total: $52–$644 at $130 an hour.
Read the transmission codes
$52–$81The actual fault lives in the transmission module.
Transmission service
$276–$644Fluid and filter first on many shift complaints.
Code titles are the generic SAE definitions. Prices are typical US parts and labor for a common car or light truck – a guide for judging a quote, not a quote. Always confirm a repair against the vehicle in front of you.