2021 Genesis G80 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2021 Genesis G80 and How to Fix Them

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Reviewed by
Devin Cabugcal
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 2021 Genesis G80 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 2021 Genesis G80 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.

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 2021 Genesis G80?

When diagnosing a cruise control issue in a 2021 Genesis G80, it's essential to adopt a systematic approach that begins with the simplest checks before moving on to more complex diagnostics. Start by inspecting the cruise control fuse to ensure it is intact, as a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are critical for operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying electronic issues. Additionally, ensure that the speed sensors are functioning correctly, as they are integral to the cruise control system's performance. The brake pedal switch should also be tested, since the system is designed to disengage when the brake is applied. Finally, inspect the wiring and connections for any damage or corrosion that could affect the system's operation. If these steps do not resolve the issue, consulting a professional mechanic is recommended for a thorough diagnosis and repair. This methodical approach not only helps in identifying the problem efficiently but also saves time and resources in the DIY process.

What are the common problems that could cause the cruise control to stop working in a 2021 Genesis G80?

When it comes to the cruise control system in a 2021 Genesis G80, several common problems can lead to its failure. One of the primary culprits is faulty speed sensors, which are crucial for the system to maintain the desired speed; if these sensors malfunction, the cruise control may not function correctly. Another frequent issue is a malfunctioning brake light switch, which can cause the cruise control to disengage unexpectedly whenever the brakes are applied, creating a frustrating driving experience. Additionally, problems with the throttle control system can hinder the cruise control's ability to maintain speed, while electrical issues, such as blown fuses or wiring problems, can disrupt the entire system. Lastly, software glitches can also play a role in cruise control malfunctions, leading to erratic behavior. By understanding these common problems, DIY enthusiasts can better diagnose and potentially resolve issues with their vehicle's cruise control system, ensuring a safer and more reliable driving experience.

How urgent is it to address the malfunctioning cruise control in a 2021 Genesis G80?

When dealing with a malfunctioning cruise control in a 2021 Genesis G80, it is crucial to recognize the urgency of the situation. While it may not seem like an immediate emergency, neglecting this issue can lead to serious safety risks, such as unexpected acceleration or deceleration, which could endanger both the driver and other road users. Additionally, a malfunctioning cruise control system can detract from the overall driving experience, particularly during long trips where convenience is key. Beyond safety and comfort, ignoring these symptoms can also result in decreased fuel efficiency and potential damage to other vehicle components, leading to more costly repairs down the line. Therefore, addressing the malfunction promptly not only ensures optimal vehicle performance but also safeguards against further complications. For DIY enthusiasts, understanding these implications can motivate timely action, allowing for a safer and more enjoyable driving experience.

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2021 Genesis G80 Cruise Control Issues & Solutions