Als je googled op die code dan vind je al veel hits.
How do I fix incorrect gear ratio P0733?
Have a look at some ways with which you can correct the P0733 code:
Incorrect transmission fluid level.
Shift solenoid replacement.
Powertrain control module replacement.
Transmission control module replacement.
Adding or replacing the transmission fluid and filter.
Overhauling the current transmission.
Installing a brand-new transmission.