2015 Toyota Prius V Cruise Control Not Working

Common Causes of Cruise Control Malfunctions in Your 2015 Toyota Prius V 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 2015 Toyota Prius V 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 2015 Toyota Prius V 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 take when the cruise control is not working on a 2015 Toyota Prius V?

When faced with a malfunctioning cruise control system in your 2015 Toyota Prius V, it's essential to adopt a methodical diagnostic approach. Start by ensuring that the cruise control is correctly activated, as outlined in your owner's manual. Next, inspect the dashboard for any warning lights that could indicate underlying issues, such as a malfunctioning combination meter. If everything appears normal, enter the vehicle's self-diagnostic mode to uncover any error codes that may point to electrical system problems. Pay close attention to the cruise control switch and related components, checking for secure connections and signs of wear. Additionally, assess the throttle actuation system, as any issues here can hinder cruise control engagement. Finally, verify the functionality of the clock spring and all electrical connections, as these can also impact the system's performance. By following this structured approach, you can effectively identify and address the root cause of your cruise control issues, potentially saving time and money on professional repairs.

What are the common problems that could cause the cruise control to stop working in a 2015 Toyota Prius V?

When dealing with cruise control issues in a 2015 Toyota Prius V, it's essential to understand the common problems that may arise. One frequent culprit is incorrect activation; ensure that the cruise control stalk is pulled down sufficiently and that the system is properly engaged. Sensor obstructions can also hinder functionality, particularly the radar sensor located at the front of the vehicle, which may become dirty or blocked by debris. A simple cleaning of the sensor area can often restore proper operation. Additionally, temporary system malfunctions may occur, sometimes indicated by messages like "Cruise Control Not Available." In such cases, restarting the vehicle or allowing it to sit for a while can help reset the system. Electronic glitches, particularly in warmer weather, can also affect cruise control performance, and rebooting the vehicle may resolve these issues. For those with adaptive cruise control, be aware that specific problems, such as overreacting to other vehicles, may signal broader sensor or software issues. Lastly, utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying problems. By addressing these common issues, DIYers can effectively troubleshoot and potentially fix the cruise control system in their Prius V.

How urgent is it to address the non-functioning cruise control in a 2015 Toyota Prius V?

While the non-functioning cruise control in your 2015 Toyota Prius V may not pose an immediate safety risk, it is essential to recognize that neglecting this issue could lead to more significant problems down the line. The cruise control system is designed for convenience, particularly during long drives, but its failure might indicate underlying issues that warrant attention. For instance, a malfunctioning brake light switch or electrical problems could not only affect the cruise control but also compromise other critical systems in your vehicle. Therefore, while you can safely operate your car without cruise control, it is advisable to diagnose and address the problem sooner rather than later. By doing so, you can restore a valuable feature that enhances your driving experience and prevent potential complications that could arise from unresolved issues. Taking proactive steps to investigate the cause of the malfunction will ultimately contribute to the overall health and safety of your vehicle.

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2015 Toyota Prius V Cruise Control Issues & Repairs