lexsmooth

Hi i have a 1991 ls400 and couple days ago i was driving on the road, and check engine and trac off light came on. there wasnt any changes in driving performance at all, so i stop anyways and shut the engine off and after couple of minute i started it back up and the light was gone...
drove it today and light didnt come back on, i retreived the codes tho and they were
engine:
code 24
code 31
code 55
transmission
code 63

Anyone had experiences with these codes before?..code 31 is air flow meter and if that thing is faulty the vehicle runs on a limp mode but mine didnt...

maybe ill try resetting the ECU and see what happens

thanks