What are the reasons why the ix35's one-button start doesn't work?
4 Answers
The reason why the ix35's one-button start doesn't work is: the one-button start is being interfered with. The one-button start button for the Hyundai ix35 is located on the right side of the steering wheel and the left side of the center console area. Remove the armrest cushion, and you can see a small groove resembling a key. Place the key on it, and after sensing for 3 seconds, the car can be started. The ix35 is an SUV model under Hyundai, equipped with two engines: one is a 1.4-liter turbocharged engine, and the other is a 2.0-liter naturally aspirated engine. The 1.4-liter turbocharged engine has a maximum power of 103 kW, a maximum torque of 242 Nm, a maximum power speed of 6000 rpm, and a maximum torque speed ranging from 1500 to 3200 rpm.
When driving a Hyundai ix35, sometimes the one-button start doesn't work, usually because the key battery is low. The small built-in battery in the smart key can deplete over time, and if the signal can't be transmitted, the car won't recognize it. Additionally, you need to press the brake pedal firmly—if the pressure isn't enough, the car won't start, either because it wasn't pressed fully or the system is slow to respond. Another common issue is electronic signal interference, such as placing a phone near the key or having a strong magnetic field nearby. Moving the interference source away usually fixes it. The vehicle's 12V battery aging can also cause problems, especially in winter—low voltage can cause the starting system to fail. If this happens, don't panic. First, try using the mechanical key to open the door and start the car. If that doesn't work, check the battery. A cost-effective solution is to replace the key battery for just a few dollars, avoiding overcharging by roadside shops. It's best to check the key battery life every six months and keep a spare key in the car for peace of mind.
Based on my car repair experience, troubleshooting a malfunctioning push-button start requires a step-by-step approach. First, focus on the smart key—if its battery is dead, it won’t transmit signals. Try placing it near the start button to check for any response; this is a quick diagnostic method. Next, inspect the vehicle battery: when the 12V power is low, even the display won’t light up. Use a multimeter to measure the voltage—if it’s below 12V, the battery might be drained and require a jump-start or replacement. The brake pedal must be fully depressed; otherwise, the relay won’t activate the startup sequence. Additionally, the gear must be in Park (P); if not properly engaged, the system will lock. Faulty system components like the signal receiver module or the start button can also cause issues—try rebooting the infotainment system. Long-term neglect can worsen the problem, so I recommend having a technician inspect the push-button start system during annual maintenance to catch potential issues early, such as loose wiring or false triggers from the anti-theft system, ensuring smooth driving.
It's quite annoying when my ix35's push-button start doesn't work, but it's usually just minor daily issues. When the key signal is weak or interfered with in the bag, simply take it out and bring it close to the start button. Battery aging is the most common problem; the coin cell battery in the smart key lasts about 2 years and should be replaced, otherwise the push-button start won't work. Not pressing the brake pedal firmly enough is also easily overlooked—press it a bit harder to ensure proper contact. Remove any interfering objects like phones or electronic devices near the key, as sometimes parking near a signal tower can cause malfunctions. If all else fails, try the spare key. To prevent such troubles, I make it a habit to check the key's battery status monthly, ensuring a worry-free trip.
