Porsche 718 Boxster Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Porsche 718 Boxster 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
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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 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 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.

Troubleshooting Cruise Control Issues in a Porsche 718 Boxster

When troubleshooting cruise control issues in your Porsche 718 Boxster, begin by examining the simplest components first. Start with the cruise control switch; ensure it is functioning correctly and not stuck in the off position. Next, check the clutch pedal for any sticking or unusual resistance, as this can prevent the cruise control from engaging. If these initial checks do not resolve the issue, move on to the throttle and associated sensors, as they play a crucial role in the cruise control system's operation. A malfunctioning throttle can disrupt the system's ability to maintain speed. Finally, if the problem persists, consider the control module, which may require professional diagnostics. By following this methodical approach, you can effectively identify and address the root cause of your cruise control problems, ensuring a smoother driving experience.

What Could Cause Cruise Control Malfunctions in a Porsche 718 Boxster?

When dealing with cruise control malfunctions in a Porsche 718 Boxster, it's essential to understand the common problems that may arise. One frequent issue is the failure of the control module, which can disrupt the entire cruise control system. Additionally, sensor or switch failures, particularly those related to the throttle position or brake pedal, can prevent the cruise control from engaging properly. Throttle actuation problems are also notable; a faulty throttle position sensor may cause the engine's computer to miscalculate fuel delivery, leading to performance issues such as black exhaust. Software glitches, especially those affecting the auto-stop function, can further complicate matters, potentially causing the cruise control to malfunction intermittently. Moreover, if your vehicle is equipped with adaptive cruise control, any issues with related systems like power steering may also impact functionality. To effectively troubleshoot and resolve these cruise control issues, a thorough inspection of these components is crucial, allowing DIY enthusiasts to pinpoint the exact cause and take appropriate corrective action.

Why is the Cruise Control Not Working in a Porsche 718 Boxster?

When the cruise control in your Porsche 718 Boxster fails to operate, it’s crucial to address the issue promptly, as neglecting it could lead to safety risks and further complications. Common culprits include problems with the control module, throttle position sensor, or switches related to the clutch and brake. For instance, a malfunctioning throttle position sensor can cause the engine to run inefficiently, potentially leading to excessive fuel consumption and black exhaust emissions. Additionally, if the cruise control stalk or switch is intermittently operational, it may require cleaning or replacement to restore functionality. Ignoring these symptoms not only compromises your driving experience but could also escalate into more significant mechanical issues, making it essential to diagnose and resolve the problem as soon as possible. By taking a proactive approach, you can ensure that your cruise control system operates safely and effectively, enhancing your overall driving experience.

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