Reverse gear not engaged

2015 Hyundai i30 1.6 crdi
Car: Hyundai i30
Year: 2015
Variant: 1.6 crdi
Categories: Gearbox & Clutch
I have 2015 hyundai i30 1.6 crdi dual clutch transmission car, sometimes the reverse gear could not engaged until i turned off the car and restart it, after a while and when the car was on and steady, i noticed that the check engine light is on, and when i drove i noticed that the second gear could not engaged (1st to 3rd gear directly) until i turned off the car and restart it but the check engine light was still on, and after one or two hours i turned off the car for about an hour, and when i restarted it the check engine light just disappeared by itself and the car was normal after that, and i went for a long trip without any problems, note that when i did a computer check for the car, the only error in history was "the reverse gear R could not engaged".
So please if you can diagnose the problem for me and thank you.
Problem added: Jun 21, 2021 (2 years ago)
You need it scanned with appropriate equipment for fault codes and then decide on next step .
Answered Jun 22, 2021 (2 years ago)
The fault code was: p073e73 unable to engage (shift) reverse gear
Answered Jun 22, 2021 (2 years ago)
A lot of problems with that transmission as cars get older and mileage goes up . If you dont want to go to a dealership you better get a transmission specialist to advise and estimate cost
Answered Jun 22, 2021 (2 years ago)
Thank you, not that the car is 86000 miles.
Answered Jun 22, 2021 (2 years ago)

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