2000 Porsche Boxster Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 2000 Porsche Boxster 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 2000 Porsche Boxster cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 2000 Porsche 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.

When the throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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.

How to diagnose cruise control issues in a 2000 Porsche Boxster?

When diagnosing cruise control issues in a 2000 Porsche Boxster, it's essential to adopt a systematic approach that begins with the simplest potential problems before delving into more complex diagnostics. Start by checking the cruise control fuse, specifically Fuse #B7, as a blown fuse can often be the root of the issue. If the fuse is intact, inspect the cruise control stalk or switch for any signs of wear or malfunction, as these components are frequently responsible for engagement failures. Next, examine the brake pedal switch and the switch at the top of the clutch pedal, since these can interrupt the cruise control system if they are not functioning correctly. If the green indicator light does not illuminate when attempting to activate cruise control, this could signal a deeper issue with the control module or throttle actuation. In cases where the cruise control intermittently cuts out, a temporary workaround is to gently release and reapply pressure to the accelerator. By following this diagnostic approach, you can effectively identify and address the common causes of cruise control problems in your Porsche Boxster, ensuring a smoother driving experience.

What common issues cause cruise control failure in a 2000 Porsche Boxster?

When dealing with cruise control failure in a 2000 Porsche Boxster, it's essential to consider several common problems that may be affecting the system. One of the primary culprits is the control module, which can fail and disrupt the cruise control functionality. Additionally, the throttle position sensor plays a crucial role; if it malfunctions, it can lead to erratic engine behavior, such as excessive fuel consumption and black exhaust, indicating that the engine's computer is struggling to maintain proper throttle response. Another area to inspect is the cruise control stalk or switch, as dirt or wear can impede its operation, necessitating cleaning or replacement. Furthermore, the brake pedal switch is vital for cruise control engagement and disengagement, so any issues here could prevent the system from functioning correctly. Lastly, don't overlook the clutch pedal switch, which is integral to the cruise control system in Porsche vehicles; ensuring this switch is operational is key to restoring cruise control functionality. By systematically checking these components, DIYers can effectively diagnose and potentially resolve cruise control issues in their Porsche Boxster.

How urgent is it to repair the non-functioning cruise control in a 2000 Porsche Boxster?

Repairing the non-functioning cruise control in a 2000 Porsche Boxster should be treated with a sense of urgency, as neglecting this issue can lead to both inconvenience and safety risks. While it may not seem like an immediate emergency, a malfunctioning cruise control system can indicate underlying electrical problems that could affect the vehicle's overall performance. For instance, issues such as blown fuses or defective brake pedal switches are not only simple to fix but also crucial for ensuring that other systems in the car function properly. Furthermore, without a reliable cruise control, long drives can become tiring and less safe, as maintaining a consistent speed becomes a challenge. Therefore, addressing the cruise control malfunction promptly not only enhances driving comfort but also helps prevent potential complications that could arise from ignoring the symptoms. Taking action now can save you from more significant repairs down the line, making it a wise decision for any DIY enthusiast.

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2000 Porsche Boxster Cruise Control Issues & Solutions