2019 Hyundai Sonata Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Hyundai Sonata and How to Fix Them

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Reviewed by
Bo Fader
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 2019 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 2019 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 2019 Hyundai Sonata?

To effectively diagnose a cruise control issue in a 2019 Hyundai Sonata, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are not stuck or malfunctioning, as this can prevent proper engagement. Utilizing an OBD-II scanner to check for error codes is a crucial step, as it can reveal specific issues that may not be immediately visible. Additionally, inspect the speed sensors, which are vital for the cruise control system's operation, and test the brake pedal switch to confirm it is functioning correctly, since this switch is integral to the system's safety features. Finally, take a close look at the wiring and connections for any signs of damage or corrosion that could affect performance. If these steps do not resolve the issue, consulting a professional mechanic or a Hyundai service center is recommended for further assistance. This methodical approach not only helps in identifying the problem but also ensures that you cover all potential causes efficiently.

What are the common problems that could cause the cruise control to stop working in a 2019 Hyundai Sonata?

When troubleshooting cruise control issues in a 2019 Hyundai Sonata, it's essential to consider several common problems that may be at play. One of the first components to check is the brake pedal switch, as a faulty switch can prevent the cruise control from engaging, given that it is designed to deactivate when the brake is pressed. Additionally, the speed sensor plays a crucial role in maintaining a constant speed; if it malfunctions, the cruise control may fail to operate correctly. Another potential culprit is a blown fuse within the cruise control system, which can completely disable its functionality. Furthermore, issues with the throttle control system can hinder the cruise control's ability to maintain speed, while problems with the Electronic Control Module (ECM) can also lead to system failures. By systematically examining these components, DIYers can often identify and resolve the issue, restoring the cruise control functionality without the need for professional intervention.

How urgent is it to address the malfunctioning cruise control in a 2019 Hyundai Sonata?

When it comes to a malfunctioning cruise control in a 2019 Hyundai Sonata, the urgency to address the problem cannot be overstated. A faulty cruise control system can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. Ignoring these symptoms not only jeopardizes your safety but can also result in more severe mechanical issues that may require expensive repairs. Therefore, it is crucial to act swiftly and have the system inspected by a qualified mechanic or an authorized Hyundai service center. By prioritizing this repair, you not only ensure your safety but also protect your vehicle from further complications that could arise from neglecting the issue. Taking prompt action is essential for maintaining the integrity of your vehicle and ensuring a safe driving experience.

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