2014 Toyota Prius Plug-In Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2014 Toyota Prius Plug-In and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2014 Toyota Prius Plug-In 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 2014 Toyota Prius Plug-In 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2014 Toyota Prius Plug-In?

When faced with a non-functioning cruise control in your 2014 Toyota Prius Plug-In, it's essential to approach the diagnosis methodically. Start by checking the cruise control fuse; a blown fuse can often be the simplest explanation for the issue. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational, as a malfunctioning switch can prevent the system from engaging. It's also crucial to verify that your brake lights are functioning correctly, since a faulty brake light switch can inadvertently disable the cruise control. Additionally, examine the vehicle speed sensor, which is vital for the cruise control to work properly; if this sensor is not functioning, it can lead to cruise control failure. Finally, consider scanning the vehicle's onboard diagnostic system for any error codes that may provide insight into the problem. By following these steps, you can effectively identify and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2014 Toyota Prius Plug-In?

When dealing with cruise control issues in a 2014 Toyota Prius Plug-In, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can inadvertently signal that the brakes are engaged, thereby disabling the cruise control. Additionally, a malfunctioning speed sensor can prevent the system from accurately detecting the vehicle's speed, leading to erratic cruise control behavior. Problems within the throttle control system, such as a defective throttle position sensor, can also hinder the cruise control's ability to maintain speed. Electrical issues, including blown fuses or wiring faults, may disrupt the cruise control module's functionality. Lastly, software glitches in the vehicle's onboard computer can cause temporary disruptions; in such cases, updating or resetting the system might restore normal operation. By identifying and addressing these potential issues, DIYers can effectively troubleshoot and restore the cruise control functionality in their Prius Plug-In.

How urgent is it to address the malfunctioning cruise control in my 2014 Toyota Prius Plug-In?

When it comes to the malfunctioning cruise control in your 2014 Toyota Prius Plug-In, the urgency of addressing the issue cannot be overstated. A malfunctioning system poses significant safety concerns, as it can lead to unexpected changes in speed, increasing the risk of losing control while driving. This is particularly critical on highways or in heavy traffic, where maintaining a consistent speed is essential for safe driving. Additionally, neglecting this problem can compromise the overall performance of your vehicle, potentially leading to decreased fuel efficiency and responsiveness. Furthermore, ignoring the symptoms of a malfunctioning cruise control may result in more severe damage to the vehicle's systems, ultimately leading to costly repairs down the line. Therefore, it is crucial to prioritize the diagnosis and repair of your cruise control system to ensure your safety, maintain optimal vehicle performance, and avoid unnecessary expenses.

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