If you are stuck in 3rd gear then the management system has encountered a transmission malfunction and put you in limp mode .
What you now need to do if find a good shop with a good diagnostic scan tool and check for malfunction codes .
A regular OBD code reader will not get transmission codes .
Common issue for this is if one of the speed sensors fail .
But to be sure you need to have the car linked up to a transmission scan tool to gather codes .
Ones you have the codes you will then know what to have repaired or replaced ,
if needed please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.
Your deposit does not pay me until the answer is rated in a positive way,
Not rating or a bad rating does not constitute a refund.
If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .
Kind regards Greg.