P0705 Incorrect signal from gear position sensor
P0730 Incorrect gear ratio
Due to P0730 being one of the code condition the transmission will only operate in 4th gear, P0730 will put the transmission in a limp mode or a limited gear position. Replace the gear position sensor if this is faulty it will also cause P0730 to occur and the flashing shift light. Check the tranmission fluid level. low transmission fluid level will do more problem than just four different tire size. With this year model only the ABS system (if equipt) is only affected.