2020 Hyundai Sonata Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 Hyundai Sonata and How to Fix Them

Find Repair Location
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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 Hyundai Sonata cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to 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 throttle 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 2020 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 steps should I take to diagnose the non-functioning cruise control in my 2020 Hyundai Sonata?

To effectively diagnose the non-functioning cruise control in your 2020 Hyundai Sonata, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box; a blown fuse is a straightforward fix that can often resolve the issue. Next, examine the cruise control buttons on your steering wheel for any signs of sticking or damage, as these can hinder functionality. If the buttons appear to be in good condition, proceed to verify the speed sensor, which plays a crucial role in the cruise control system's operation. A malfunctioning speed sensor can disrupt the system's ability to maintain speed. Additionally, check the brake pedal switch, as this component is designed to disengage cruise control when the brake is applied; ensure it is functioning correctly. Utilizing an OBD-II scanner can also be beneficial, as it allows you to scan for error codes that may indicate specific problems within the cruise control system. Finally, inspect the wiring and connections associated with the cruise control for any signs of damage or loose connections. By following this diagnostic approach, you can efficiently identify the root cause of the cruise control issue and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to stop working in a 2020 Hyundai Sonata?

When troubleshooting the cruise control system in a 2020 Hyundai Sonata, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which can disrupt the system's ability to engage or disengage properly. Additionally, issues with the speed sensor can result in inaccurate speed readings, causing the cruise control to malfunction. A blown fuse within the cruise control circuit can also prevent the system from functioning as intended. Furthermore, if there are problems with the throttle control system, it may struggle to maintain a consistent speed. Lastly, any underlying electrical issues, such as damaged wiring or a malfunctioning control module, can significantly impact the cruise control's performance. By identifying and addressing these potential issues, you can effectively troubleshoot and restore the functionality of your vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2020 Hyundai Sonata?

Addressing a malfunctioning cruise control in a 2020 Hyundai Sonata is of utmost importance due to the potential safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions. Additionally, the convenience of using cruise control is compromised, affecting the overall driving experience. Ignoring these symptoms can also lead to increased fuel consumption, as inconsistent speed control disrupts optimal driving efficiency. Moreover, delaying repairs may allow underlying issues to worsen, resulting in more extensive and costly damage to the vehicle. Therefore, it is crucial to have the cruise control system inspected and repaired by a qualified technician as soon as possible to ensure safe and efficient operation of your Sonata.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.