2016 Toyota Prius Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Toyota Prius 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2016 Toyota Prius 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 2016 Toyota Prius 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 2016 Toyota Prius?

To effectively diagnose a cruise control issue in a 2016 Toyota Prius, it's essential to adopt a systematic diagnostic approach that prioritizes simpler checks before delving into more complex assessments. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational and not obstructed. Utilizing an OBD-II scanner to check for error codes can provide critical insights into any underlying issues. Following this, assess the vehicle speed sensor, which is vital for the cruise control's performance, and test the brake pedal switch, as a malfunction here can prevent the system from engaging. Additionally, inspect all related wiring and connections for any signs of wear or damage. If these preliminary checks do not resolve the issue, it may be necessary to consult a professional mechanic for a thorough diagnosis. This structured approach not only helps in identifying the problem efficiently but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2016 Toyota Prius?

When troubleshooting cruise control issues in a 2016 Toyota Prius, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging since it is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to failure. A blown fuse in the cruise control circuit can also halt its operation entirely. Furthermore, the throttle actuator, responsible for regulating engine speed, may malfunction, impacting cruise control functionality. Lastly, problems with the Electronic Control Module (ECM), which oversees various vehicle functions, can result in cruise control issues. If you experience any of these problems, it's advisable to consult a qualified mechanic for a thorough diagnosis and repair.

How urgent is it to address the malfunctioning cruise control in my 2016 Toyota Prius?

Addressing a malfunctioning cruise control system in your 2016 Toyota Prius is crucial for maintaining both your safety and the vehicle's integrity. A malfunction can lead to unexpected acceleration or deceleration, creating a hazardous driving environment that could result in accidents. Additionally, the constant need to manually control your speed can lead to driver fatigue and distraction, further increasing the risk of mishaps on the road. Ignoring these symptoms not only compromises safety but can also lead to higher fuel consumption due to inconsistent speed management. Moreover, delaying repairs may exacerbate the issue, potentially causing more extensive damage to the vehicle's systems, which could result in significantly higher repair costs down the line. Therefore, it is imperative to address any cruise control malfunctions promptly to ensure a safe driving experience and to avoid unnecessary expenses.

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