2016 Hyundai Sonata Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Hyundai Sonata and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2016 Hyundai Sonata cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent acceleration and poor engine response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2016 Hyundai Sonata cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the steps to diagnose the cruise control issue in a 2016 Hyundai Sonata?

To effectively diagnose a cruise control issue in your 2016 Hyundai Sonata, start with the simplest components first. Begin by inspecting the brake light switch, as a malfunction here can prevent the cruise control from engaging. Next, check the speed sensor, which is crucial for the cruise control system to function correctly; any faults in this sensor can disrupt the system's operation. After that, examine the cruise control switch itself for any signs of damage or malfunction. If you have the Smart Cruise Control feature, be attentive to any warning messages, such as "Check driver assistance system," and look for warning lights on the instrument cluster, as these can indicate deeper issues that may require professional inspection. By following this structured approach, you can efficiently identify and potentially resolve the cruise control problems in your vehicle.

What common issues cause cruise control failure in a 2016 Hyundai Sonata?

When dealing with cruise control failure in a 2016 Hyundai Sonata, it's essential to understand the common problems that may arise. One frequent culprit is a malfunctioning control module, sensor, or switch, which can disrupt the system's functionality. Additionally, throttle actuation issues can prevent the cruise control from engaging properly, while a failing throttle position sensor may cause the engine computer to overcompensate, resulting in black exhaust emissions. It's also worth checking for blown fuses, as these can often be replaced easily by consulting the owner's manual. Lastly, faulty brake switches are a common issue that can lead to cruise control malfunctions; replacing these switches can often restore proper operation. By identifying these potential problems, DIYers can take the necessary steps to troubleshoot and resolve cruise control issues effectively.

How urgent is it to address the malfunctioning cruise control in a 2016 Hyundai Sonata?

Addressing a malfunctioning cruise control in your 2016 Hyundai Sonata is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control fails, it can lead to unpredictable vehicle behavior, especially during long drives where maintaining a steady speed is essential. This unpredictability can compromise your ability to control the vehicle effectively, increasing the risk of accidents. Additionally, a malfunctioning cruise control system can adversely affect your vehicle's acceleration and overall performance, potentially leading to a less responsive driving experience. Ignoring these issues may also result in decreased fuel efficiency, as the engine's computer may overcompensate, causing excessive fuel consumption and even visible black exhaust. Furthermore, cruise control problems can be symptomatic of more serious underlying issues that could escalate if left unaddressed. Therefore, it is crucial to act swiftly and have your vehicle inspected by an authorized Hyundai dealer to ensure both your safety and the optimal performance of your Sonata.

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