2021 Toyota Highlander Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2021 Toyota Highlander 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 Highlander 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 Highlander 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 2021 Toyota Highlander?

When diagnosing a cruise control issue in a 2021 Toyota Highlander, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex solutions. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning properly and not stuck, as this can impede engagement. Utilizing a diagnostic scanner to check for error codes can reveal any underlying issues within the vehicle's onboard computer that may affect cruise control functionality. Additionally, it's important to assess the speed sensors, as any malfunction here can directly impact the system's performance. Don't forget to check the brake and clutch switches, which are integral to the cruise control system; ensuring they operate correctly is essential. Inspecting the wiring and connections for any signs of damage or corrosion is also vital, as these can hinder the system's performance. Finally, testing the cruise control module will help confirm whether it is sending the correct signals to engage and disengage the system. If these steps do not resolve the issue, seeking assistance from a professional mechanic may be necessary for a thorough diagnosis and repair. By adhering to this structured approach, you can effectively troubleshoot and potentially resolve cruise control problems in your Highlander.

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

When troubleshooting cruise control issues in a 2021 Toyota Highlander, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, a blown fuse within the cruise control circuit can disrupt its operation entirely, rendering it nonfunctional. Another critical component to consider is the vehicle speed sensor; if this sensor is malfunctioning, it can prevent the cruise control from maintaining a consistent speed. The brake light switch also plays a vital role, as a malfunction here can cause the cruise control to disengage unexpectedly when the brakes are applied. Lastly, issues with the throttle actuator can affect the system's capability to adjust the vehicle's speed accurately. By identifying and addressing these common problems, you can effectively troubleshoot and potentially resolve the cruise control issues in your Highlander.

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

When it comes to a malfunctioning cruise control in a 2021 Toyota Highlander, 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 extensive damage to the vehicle's electronic systems, leading to costly repairs down the line. For those considering a DIY approach, it is crucial to recognize that while some issues may seem minor, they can escalate quickly if not handled promptly. Therefore, consulting a certified mechanic or dealership for a thorough diagnosis and repair is highly advisable to ensure the vehicle operates safely and efficiently. Taking immediate action not only protects you and your passengers but also preserves the integrity of your vehicle, making it essential to prioritize the resolution of any cruise control malfunctions.

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