2021 Toyota Avalon Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2021 Toyota Avalon 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2021 Toyota Avalon 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 Avalon 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.

What are the initial diagnostic steps to take when the cruise control isn't working on a 2021 Toyota Avalon?

When faced with a non-functioning cruise control system in your 2021 Toyota Avalon, it's crucial to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can be a simple yet common culprit behind the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as any issues here can directly affect functionality. It's also important to verify the speed sensor, which plays a vital role in detecting vehicle speed; a malfunctioning sensor can disrupt the cruise control system. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into specific issues that may be present. Additionally, ensure that your brake lights are functioning correctly, as a faulty brake light can disable the cruise control system. Lastly, inspect the vacuum lines associated with the cruise control for any signs of leaks or damage, as these can also lead to operational failures. By following these steps, you can effectively diagnose and potentially resolve the issue with your cruise control system before considering professional assistance.

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

When the cruise control in your 2021 Toyota Avalon ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it may prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain a steady speed, as it relies on accurate speed readings to function correctly. Another potential problem could be a blown fuse within the cruise control system; checking the fuse box for any damaged fuses and replacing them can often resolve the issue. Furthermore, a malfunction in the throttle control system may hinder the cruise control's performance, as it needs to operate smoothly to maintain the desired speed. Lastly, problems with the Electronic Control Module (ECM), which oversees various vehicle functions including cruise control, can also lead to failures. By systematically checking these components, you can effectively troubleshoot and potentially restore the cruise control functionality in your Avalon.

How urgent is it to address the malfunctioning cruise control in my 2021 Toyota Avalon?

Addressing a malfunctioning cruise control in your 2021 Toyota Avalon is of utmost importance due to the significant safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can create dangerous driving conditions and increase the likelihood of accidents. Moreover, when cruise control fails, drivers may find themselves distracted and fatigued as they constantly adjust their speed manually, detracting from their focus on the road. Ignoring these symptoms not only compromises your safety but can also lead to higher fuel consumption, as maintaining a consistent speed becomes more challenging. Additionally, delaying repairs can result in more extensive damage to the cruise control system, ultimately leading to higher repair costs. Therefore, it is crucial to address any issues with your cruise control promptly to ensure a safe and efficient driving experience.

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