2001 Porsche Boxster Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 2001 Porsche Boxster 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 2001 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 2001 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.

What basic checks should I perform for cruise control issues in a 2001 Porsche Boxster?

When troubleshooting cruise control issues in your 2001 Porsche Boxster, start with the simplest checks to identify the problem efficiently. Begin by verifying that the cruise control activation button on the stalk is functioning; the green light on the dashboard should illuminate when pressed. If the light does not turn on, this could indicate a problem with the button itself. Next, inspect the cruise control unit, switch, and sensor for any visible damage or signs of malfunction. It's also essential to check Fuse #B7, as a blown fuse can disrupt electrical systems. Pay attention to the switch at the top of the clutch pedal, as a faulty switch here can prevent the cruise control from engaging. Additionally, test the brake pedal switch and the cruise control switch to ensure they are working correctly; if they are not, replacing them may resolve the issue. Don’t forget to examine the wiring and connections related to the cruise control system for any loose or damaged wires. Lastly, inspect the cruise control box located above the gas pedal for any issues. By systematically addressing these areas, you can effectively diagnose and potentially fix the cruise control problems in your Porsche Boxster.

What common issues cause cruise control failure in a 2001 Porsche Boxster?

When experiencing cruise control failure in a 2001 Porsche Boxster, it's essential to consider several common issues that could 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 critical role; if it malfunctions, it may cause the engine's computer to mismanage fuel delivery, potentially leading to black exhaust emissions. Another area to inspect is the throttle actuation system, as any problems here can directly impact cruise control performance. Furthermore, the switches on the clutch and brake pedals are vital for the cruise control to operate correctly; if these switches are dirty or damaged, they may need cleaning or replacement to restore functionality. By focusing on these specific components, DIYers can effectively diagnose and address the issues causing cruise control failure in their Porsche Boxster.

How urgent is it to repair the non-functioning cruise control in a 2001 Porsche Boxster?

While the non-functioning cruise control in a 2001 Porsche Boxster may not pose an immediate safety risk, it is still advisable to address the issue sooner rather than later. Neglecting this repair can lead to a less enjoyable driving experience, particularly on long trips where cruise control can significantly reduce fatigue. Additionally, if the malfunction stems from a simple issue like a blown fuse or a faulty brake pedal switch, resolving it promptly can prevent further complications and ensure that your vehicle operates at its best. By taking the time to fix the cruise control, you not only enhance your comfort but also maintain the overall performance of your Porsche, making it a worthwhile endeavor for any DIY enthusiast.

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