marahunter4

Elantra automatic transmission issue

My 2018 Hyundai Elantra diesel sometimes won't start, and the check engine light is on. It's got just over 100k km. Seems related to the parking position on the automatic transmission. Also, the gearbox slips sometimes. The error code points to a fault in the transmission. The mechanic suspects the control unit. Any ideas? I hope it won't cost more than 1000€.

A 2018 Hyundai Elantra diesel is experiencing starting issues and a check engine light, seemingly linked to the automatic transmission's parking position. The gearbox also slips, and an error code indicates a transmission fault. The mechanic suspects the control unit, which was confirmed and replaced at a cost of about 1000€.

Did this summary help you solve your problem?

4 comment(s)

Interesting. I had a similar problem with my old Opel Astra, also with an automatic gearbox. The engine wouldn't start intermittently, and it turned out to be a faulty transmission sensor. It was as if the car didn't recognize that it was in Park. Did you check the transmission sensor?

Thanks for the reply! I'm not very familiar with car repairs. Where exactly is the transmission sensor located, and is it something I could potentially check myself?

I'm also not a mechanic, but if I remember correctly, the sensor sits somewhere on the transmission itself. I wouldn’t try to fix it yourself, as you need some technical knowledge and you can do more damage. Best bet is to take it to a workshop. They should be able to diagnose it properly and tell you exactly what's going on.

Thanks a lot for the advice. I took it to the workshop as you suggested. It turned out that the control unit was indeed defective. It cost me about 1000€.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

HYUNDAI

community_crosslink_rmh_model

ELANTRA