2019 Toyota Sienna Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Toyota Sienna 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2019 Toyota Sienna 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 2019 Toyota Sienna 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 2019 Toyota Sienna?

To effectively diagnose a cruise control issue in your 2019 Toyota Sienna, begin with the simplest solutions before progressing to more intricate assessments. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent proper operation. If these initial checks do not resolve the issue, utilize an OBD-II scanner to identify any error codes that may indicate specific problems within the cruise control system. Following this, examine the speed sensors, as they are essential for the cruise control's performance. Additionally, verify that the brake and clutch switches are functioning correctly, since these components are designed to disengage the cruise control when necessary. If the problem persists, test the cruise control module to ensure it is communicating effectively. Finally, inspect all wiring and connections for any signs of damage or corrosion that could be impacting the system. By following this structured diagnostic approach, you can systematically identify and address the root cause of your cruise control issue.

What are the common problems that could cause the cruise control to stop working in a 2019 Toyota Sienna?

When the cruise control in your 2019 Toyota Sienna 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 crucial for disengaging the cruise control when the brake is applied; if this switch malfunctions, it may prevent the system from engaging at all. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain speed, as it relies on accurate readings to operate correctly. A blown fuse in the cruise control circuit can also be a simple yet overlooked reason for failure, cutting off power to the system entirely. Furthermore, throttle-related problems, such as a stuck throttle or issues with the throttle position sensor, can hinder the cruise control's performance. Lastly, a malfunctioning Electronic Control Module (ECM) can affect various vehicle functions, including cruise control, leading to operational failures. If you encounter these issues, a thorough inspection of these components can help you identify and resolve the problem, potentially saving you time and money on repairs.

How urgent is it to address the malfunctioning cruise control in a 2019 Toyota Sienna?

When it comes to a malfunctioning cruise control in a 2019 Toyota Sienna, the urgency of addressing the issue cannot be overstated. A faulty cruise control system can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk not only to the driver but also to other road users. Ignoring these symptoms can result in dangerous driving situations, increasing the likelihood of accidents. Moreover, delaying repairs may exacerbate the problem, potentially leading to more extensive damage to the vehicle's systems and incurring higher repair costs down the line. Therefore, it is crucial to consult a qualified mechanic or an authorized Toyota service center as soon as you notice any irregularities with the cruise control. Prompt action not only ensures your safety but also maintains the integrity of your vehicle, allowing you to drive with confidence.

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