2017 Toyota Prius Prime Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Toyota Prius Prime and How to Fix Them

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Reviewed by
Aisha
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 2017 Toyota Prius Prime 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 2017 Toyota Prius Prime 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 2017 Toyota Prius Prime?

To effectively diagnose a cruise control issue in a 2017 Toyota Prius Prime, it's essential to adopt a systematic approach that begins with the simplest potential problems before progressing to more complex diagnostics. 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 for any signs of sticking or malfunction, as these controls are critical for operation. Utilizing an OBD-II scanner to scan for error codes can provide insights into any underlying issues, guiding your next steps. It's also important to verify the functionality of the speed sensors, as they are integral to the cruise control system's performance. Additionally, ensure that the brake lights are working properly, since a faulty brake light switch can prevent the cruise control from engaging. Finally, if the previous checks do not reveal the issue, testing the cruise control module will help determine if it is sending the correct signals to the vehicle's computer. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control problem.

What are the common problems that could cause the cruise control to stop working in a 2017 Toyota Prius Prime?

When troubleshooting the cruise control system in a 2017 Toyota Prius Prime, it's essential to understand the common problems that may lead to its failure. One of the primary issues could be a faulty brake light switch, which is crucial for the cruise control's operation as it disengages the system when the brake pedal is pressed. Additionally, problems with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to malfunction. Another potential culprit is the throttle actuator, which adjusts the engine's throttle in response to cruise control commands; if it fails, the system may not function correctly. A defective cruise control module can also prevent the system from engaging or maintaining speed, while electrical issues, such as blown fuses or wiring problems, can further complicate the situation. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control system in your Prius Prime, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2017 Toyota Prius Prime?

Addressing a malfunctioning cruise control in a 2017 Toyota Prius Prime is of utmost importance due to the potential safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions and increase the likelihood of accidents. Additionally, neglecting this issue may compromise the overall driving experience, making it less convenient and enjoyable to use this feature. Furthermore, a malfunctioning cruise control system can lead to increased fuel consumption and unnecessary wear on the vehicle's components, ultimately resulting in more costly repairs down the line. Therefore, it is crucial to prioritize the diagnosis and repair of any cruise control issues to ensure both safety and efficiency while driving.

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2017 Toyota Prius Prime Cruise Control Issues Explained