What is the reason for the malfunction of Kia K5's one-key start?
2 Answers
Kia K5's one-key start malfunction is caused by: the key is out of battery, and the car fails to recognize the key; if the key has power but there is no response when pressing the button, it may be due to a faulty button. If the above situations occur, it is recommended that the owner go to a 4S store for inspection. The Kia K5 is a mid-size sedan under Kia, with body dimensions of 4980mm in length, 1865mm in width, 1445mm in height, and a wheelbase of 2990mm. The Kia K5 is equipped with two engines: one is a 2.0-liter naturally aspirated engine with a maximum power of 118kW and a maximum torque of 193Nm; the other is a 1.6-liter turbocharged engine with a maximum power of 132kW and a maximum torque of 265Nm.
My Kia K5 has been running for three years, and when the one-touch start fails, the first thing that comes to mind is that the key battery is dead. Try replacing it with a new one, usually a CR2032 model. Next, check if the car battery voltage is low; use a multimeter to measure it—if it's below 12V, it might not start. The system requires the brake pedal to be firmly pressed. If the floor mat is stacked too high or the sensor is faulty, it may misjudge. Last month, I encountered a situation where the button wouldn’t press—it was due to rust on the internal contacts, which a gentle cleaning fixed. Worn wiring or communication issues with the control module can also cause failure, especially in rainy or cold weather, which tends to expose hidden problems. Lastly, don’t forget about interference from the anti-theft system—try moving the key farther away and testing again. If these simple checks don’t resolve the issue, quickly seek a professional mechanic to avoid disrupting daily commutes.
