2021 Porsche 718 Boxster Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2021 Porsche 718 Boxster

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Reviewed by
Bo Fader
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 2021 Porsche 718 Boxster 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 2021 Porsche 718 Boxster 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2021 Porsche 718 Boxster?

When faced with a non-functional cruise control in your 2021 Porsche 718 Boxster, it's essential to adopt a methodical diagnostic approach. Start by checking the cruise control fuse; a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, inspect the cruise control switch located on the steering wheel, as a malfunctioning switch can prevent the system from engaging. It's also crucial to verify the functionality of the vehicle speed sensor, which is integral to the cruise control's performance. Additionally, examine the brake pedal switch to ensure it isn't stuck or faulty, since the cruise control is designed to disengage when the brakes are applied. Finally, consider scanning the vehicle's onboard computer for any error codes that may provide insights into the underlying problem. By following these steps, you can effectively diagnose and potentially resolve the cruise control issue, empowering you to take control of your vehicle's functionality.

What are the common problems that could cause the cruise control to stop working in a 2021 Porsche 718 Boxster?

When troubleshooting the cruise control system in a 2021 Porsche 718 Boxster, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, resulting in failure to engage or maintain speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it may inadvertently signal the cruise control to disengage whenever the brakes are applied. Another potential issue is a blown fuse, which can completely disable the cruise control system. Throttle-related problems, such as a stuck throttle or issues with the throttle position sensor, can also disrupt the system's functionality. Lastly, electrical problems, including wiring issues or a malfunctioning control module, can lead to significant disruptions in the cruise control operation. By systematically checking these components, DIYers can effectively diagnose and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the malfunctioning cruise control in my 2021 Porsche 718 Boxster?

Addressing a malfunctioning cruise control system in your 2021 Porsche 718 Boxster is of utmost importance due to the immediate safety risks it poses. A malfunction can disrupt your ability to maintain a consistent speed, increasing the likelihood of accidents and creating unsafe driving conditions. Moreover, neglecting this issue can lead to more severe damage to your vehicle's systems, resulting in costly repairs down the line. By prioritizing the repair of your cruise control, you not only enhance your safety on the road but also protect your investment in the vehicle, ensuring it operates efficiently and smoothly. Taking prompt action can prevent inconveniences and disruptions, allowing you to enjoy a seamless driving experience without the worry of unexpected malfunctions.

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2021 Porsche 718 Boxster Cruise Control Issues & Repairs