2021 Toyota 4Runner Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2021 Toyota 4Runner 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2021 Toyota 4Runner 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 Toyota 4Runner 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 cruise control issue in my 2021 Toyota 4Runner?

To effectively diagnose the cruise control issue in your 2021 Toyota 4Runner, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable problem that can disrupt functionality. Next, examine the cruise control buttons on your steering wheel to ensure they are operational, as faulty buttons can prevent the system from engaging. Following this, verify the speed sensor, which is essential for maintaining a consistent speed; if it’s malfunctioning, it can lead to cruise control issues. Additionally, check the brake pedal switch, which is designed to disengage the cruise control when the brakes are applied; a faulty switch may cause the system to behave erratically. If these initial checks do not resolve the issue, utilize an OBD-II scanner to identify any error codes that may provide further insight into the problem. Should these steps fail to yield results, it may be necessary to consult a professional mechanic or an authorized Toyota service center for a comprehensive diagnosis and repair. By following this structured diagnostic approach, you can efficiently identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2021 Toyota 4Runner?

When troubleshooting cruise control issues in a 2021 Toyota 4Runner, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging since it is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to functionality problems. A blown fuse in the cruise control circuit is another simple yet often overlooked issue that can halt operation; checking and replacing the fuse may quickly resolve the problem. Furthermore, a malfunctioning throttle actuator can affect the engine speed control, impacting the cruise control's performance. Lastly, a defective cruise control module itself can be a significant factor in cruise control failure. By systematically checking these components, you can effectively diagnose and potentially fix the cruise control system in your 4Runner, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2021 Toyota 4Runner?

When it comes to a malfunctioning cruise control system in your 2021 Toyota 4Runner, the urgency to address the problem cannot be overstated. A faulty cruise control can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which significantly increases the risk of accidents on the road. This is not just a minor inconvenience; it poses a serious safety hazard for you and other drivers. Moreover, delaying repairs can exacerbate the issue, potentially leading to more extensive damage to the vehicle's electronic systems or mechanical components, resulting in higher repair costs down the line. Therefore, if you notice any irregularities with your cruise control, it is crucial to consult a certified mechanic or an authorized Toyota service center as soon as possible. Taking prompt action not only ensures your safety but also helps maintain the overall performance and reliability of your vehicle.

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