1. A dead key fob. Without a key fob, your Kia is not going to start. This is general knowledge. The biggest cause of Kia push-button start problems is a key fob with a weak or dead battery. This is very common because most car owners rarely remember to switch the batteries of their key fobs. Some car owners don’t even know that the key fob First of all, pull out the front door panels and disconnect the connector from the latch one-by-one to see if this fixes the problem. If not, sees if the door lock cylinders feel hard or spongy on locking them by moving the key back and forth. If so, the door could well be the problem, and the latch may need replacing. At first, insert the Kia key fob in the ignitin switch. Next, push and hiold pushing the lock button of key fob for 3 seconds. Finally, wait for the key fob blinking lights on dash. When you see the key fob indicating lights blink on the dashboard, be sure the key fob is reprogrammed and you are now good to go. Sorento LX 3.3L V6. Automatic transmission. 55,526 miles. The central lock of the front-right door is failing to close, therefore the car is not locking the door. Manual look is not possible too Hyundai Elantra – (Jonathan Weiss / Shutterstock) The most common cause of key fob not locking or unlocking the doors in Hyundai Elantra is dead coin battery inside the key fob. But the remote control can also stop working due to worn buttons, poor battery contact, water damage, receiver module issues, signal interference, dead 12 volt Kia Ceed key fob not working – causes and how to fix it ; Subaru Outback check engine light is on – causes and how to reset ; BMW X5 pulls to the right when driving ; Mercedes-Benz GLA dirty cabin air filter symptoms, when to replace ; VW California heater not working – causes and diagnosis for Kia Key Fob Cover and Leather Keychain - Full Cover Key Case for Kia Sportage, Soul, Forte, Telluride, EV6, NIRO, K5, Stinger - 2018-2023 TPU Keyfob Cover - Black and Gold. 45. $1299. Save 5% with coupon. FREE delivery Wed, Jan 3 on $35 of items shipped by Amazon. Replace the battery. If the button cell battery in the key fob of Optima is replaced incorrectly or a battery is unsuitable, it can damage the vehicle key. Only replace drained batteries with new batteries in the same voltage, size, and specification. Make sure the battery is facing in the right direction when inserting it. oQf9.