If the automatic transmission does not shift properly and the Check Engine Light illuminates, the speed sensors in the transmission may have failed. The sensors are simple and inexpensive to replace.Google+
Car Problem Reports
Hyundai Tucson Transmission Won't Shift/CEL Due to Failed Speed Sensors in Transmission
Hyundai Tucson Problem
Drive Trains Affected: 2WD, 4WD
Average Mileage: 90,630 mi (35,000 mi - 153,978 mi)
I have had my 2 different sensors replaced. one was a thrust sensor ? the other accelerator sensor? now my check engine light will come on when i accelerate and the car jumps, bucks, and it stays stuck in one of the gears and when i step on the gas it does not accelerate. then with in two minutes it shuts off. I have brought the car to hyundai numerous times and they say they can not find anything wrong but the last time they said i needed new spark plugs and spark wires. and it would only cost 642.00 wtf my car does not have that many miles and who the heck has that type of money nowadays. i have an extended warrenty that runs out next mth. please some one help???? i dont feel safe in my car with my 3 kids.
Visitor, 2005 Hyundai Tucson, 4WD, 80,000 mi
Transmission not shifting Speed Sensor failed. Replaced
Visitor, 2005 Hyundai Tucson, 4WD, 153,978 mi
The repair shop diagnostic reports transmission feels jumpy&trans codes are stored in history.Their solution, flush transmission fluids($59.00)replace with 8qty.ATFSB synthetic transmission fluid($9.99ea.)then drive on highway, trans will jump into gear.After 50 miles later,problem still exists.
Visitor, 2007 Hyundai Tucson, 2WD, 106,000 mi
Check engine light came on. It needed a transmission sensor that was under the transmission pan along with a new filter. Also supposed to add new transmission fluid, drive around a bit, and then flush the system.
Visitor, 2005 Hyundai Tucson, 4WD, 110,000 mi
It works only in 4wd and no more than 25 mph
check engine light come when going up steep hill dont change good