Toyota Prius AWD-e Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Toyota Prius AWD-e and How to Fix Them

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Reviewed by
Devin Cabugcal
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 Toyota Prius AWD-e 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 Toyota Prius AWD-e 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.

Troubleshooting Cruise Control Issues in a Toyota Prius AWD-e

When troubleshooting cruise control issues in your Toyota Prius AWD-e, begin by checking the most accessible components. Start with the brake light switch, as a malfunction here can prevent the cruise control from engaging. If the brake lights are not functioning correctly, this could signal a faulty switch that needs replacement. Next, inspect the cruise control switch itself for any signs of wear or damage. If these components appear to be in good condition, examine the vehicle's fuse box for any blown fuses related to the cruise control system; replacing a blown fuse can often resolve the issue. If the cruise control indicator displays an "!" or a message indicating that the system is unavailable, it may be a temporary issue with the dynamic radar cruise control system, which should resolve itself. However, if these initial checks do not yield results, consider the possibility of a failed control module or sensor, which may require more advanced diagnostics or professional assistance. By systematically addressing these potential issues, you can effectively troubleshoot and restore functionality to your cruise control system.

What Are the Common Issues Causing Cruise Control Failure in a Toyota Prius AWD-e?

When experiencing cruise control failure in a Toyota Prius AWD-e, it's crucial to identify the underlying issues that may be affecting the system. One of the most frequent culprits is a blown fuse, which can disrupt the electrical flow necessary for cruise control to function. Additionally, faulty switches can prevent the system from engaging or disengaging properly, leading to frustrating driving experiences. Another common problem is related to the speed sensor; if this component is malfunctioning, it can send incorrect data to the cruise control system, causing it to fail. Lastly, more complex issues may arise from the control module or Engine Control Module (ECM), which are essential for the overall operation of the vehicle's systems. By understanding these potential problems, DIYers can effectively diagnose and address cruise control issues, ensuring a smoother and more enjoyable driving experience.

Why is the Cruise Control Not Working in a Toyota Prius AWD-e?

When your Toyota Prius AWD-e's cruise control fails, it’s crucial to address the issue promptly to avoid potential safety risks and further damage to your vehicle. Common culprits include a malfunctioning control module, sensor, or switch, which can disrupt the entire cruise control system. Additionally, problems with throttle actuation may prevent the system from engaging properly. A blown fuse is another simple yet often overlooked issue that can halt cruise control functionality. Furthermore, the clock spring cable, which connects various steering wheel controls, may also be at fault. It's important to note that in certain driving modes, such as "B" in some Prius models, cruise control may not operate, so understanding your vehicle's specific settings is essential. By systematically checking these components, you can identify the root cause of the malfunction and take the necessary steps to restore your cruise control, ensuring a safer and more enjoyable driving experience.

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