Try these techniques if your trunk wont open to see if you can get it to do it on its own and avoid calling a locksmith. (Well get to that in a minute.) When all the doors are unlocked, the rear hatch (trunk/boot lid) should also be unlocked, so he should be able to just press the latch button under the handle himself to open it, without requiring you to physically get out of the car yourself, or use your fob. In the long run, it may become blocked or internal mechanisms may break. Why even bother with the higher floor height, then? All you have to do is flick the lever to the unlock position and that should allow you to gain entry to your trunk through the remote and the buttons on the car.Move The Lever On The Trunk Mechanism To The Unlocked PositionAdvertisementsif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'theinspiringdad_com-box-4','ezslot_5',260,'0','0'])};__ez_fad_position('div-gpt-ad-theinspiringdad_com-box-4-0'); Hopefully the reason why your Hyundai trunk wont open with the key fob is because of the valet lock being activated; if not, then unfortunately, you might have an issue with the lock mechanism itself and will most likely need replacing and can cost up to $200 to fix. Reviews. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/52\/Open-a-Trunk-Step-1.jpg\/v4-460px-Open-a-Trunk-Step-1.jpg","bigUrl":"\/images\/thumb\/5\/52\/Open-a-Trunk-Step-1.jpg\/aid9482239-v4-728px-Open-a-Trunk-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"