2020 Toyota Tundra Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 Toyota Tundra 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 2020 Toyota Tundra 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 Toyota Tundra 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2020 Toyota Tundra?

When faced with a non-functioning cruise control in your 2020 Toyota Tundra, it's crucial to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the vehicle's fuse box, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent the system from engaging. The vehicle speed sensor is another critical component; verify its functionality since the cruise control system relies on accurate speed readings. Additionally, examine the brake pedal switch, which is designed to disengage the cruise control when the brake is applied; a faulty switch can lead to operational issues. Utilizing a diagnostic scanner to check for error codes can provide further insights into any underlying problems. Lastly, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion. By following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your Tundra, empowering you to tackle the problem with confidence.

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

When the cruise control in your 2020 Toyota Tundra ceases to function, it can be frustrating, but understanding the common issues can help you diagnose the problem. One frequent culprit is a faulty brake light switch, which is crucial for the cruise control system as it disengages when the brake pedal is pressed. If this switch malfunctions, it may prevent the cruise control from engaging at all. Another potential issue lies with the speed sensor; if this component is not accurately relaying speed information, the cruise control may struggle to maintain a constant speed. Additionally, a blown fuse can disrupt the entire cruise control system, rendering it inoperable. Problems with the throttle control system, particularly a faulty throttle position sensor, can also hinder the cruise control's ability to function correctly. Lastly, issues with the Electronic Control Module (ECM), which oversees various vehicle functions including cruise control, can lead to failures in the system. If you encounter any of these issues, a thorough inspection can help identify the specific problem, allowing you to take the necessary steps to restore your cruise control functionality.

How urgent is it to address the malfunctioning cruise control in my 2020 Toyota Tundra?

When it comes to a malfunctioning cruise control system in your 2020 Toyota Tundra, the urgency to address the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating a hazardous driving environment that increases the risk of accidents. Promptly addressing these symptoms is essential not only for your safety but also for the safety of others on the road. Ignoring the problem may result in more severe complications, including damage to the vehicle's electronic systems, which could lead to costly repairs down the line. Therefore, it is crucial to take immediate action by inspecting the cruise control system or consulting a qualified mechanic to ensure that your vehicle remains safe and reliable. Prioritizing this repair will help you avoid potential dangers and maintain the overall health of your Tundra.

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2020 Toyota Tundra Cruise Control Issues & Repair Costs