1999 Porsche Boxster Cruise Control Isn't Working
Diagnosing Common Issues with Cruise Control in Your 1999 Porsche Boxster and How to Fix Them
- 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.
What are the best Porsche repair shops?
Tuffy Tire & Auto Service Center - Grandview
Excite Auto Repair & Towing
All In Auto Service
Tuffy Tire & Auto Service - Grove City
How much does it cost to fix a 1999 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 are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1999 Porsche Boxster?
When troubleshooting the non-functional cruise control in a 1999 Porsche Boxster, start by checking the stalk switch, as it is the most accessible component. Ensure that the cruise control switch is operational by confirming that the green indicator light on the speedometer illuminates when engaged. If the light fails to turn on, the switch may need replacement. Next, verify that you are engaging the cruise control correctly by gently pushing the right lower stalk forward. If the light is on but the system does not engage, this could indicate a deeper issue with the switch or another component. Inspect the brake and clutch switches, as faulty switches can disrupt the cruise control's functionality; ensure that the brake lights work and that the brake pedal switch is functioning properly. Additionally, check all related electrical connections for security and damage, especially if any recent work was done on the vehicle. A blown fuse, particularly fuse B7, can also be a simple yet overlooked cause of the problem. If you have installed aftermarket LED tail lights, consider that they might interfere with the cruise control system, and reverting to stock lights could resolve the issue. Lastly, performing an Egas calibration of the accelerator pedal can help reset the system. If these steps do not yield results, using a diagnostic tool like the Porsche System Tester 2 or Durametric can provide insights into any stored faults in the control modules, guiding you toward a more precise diagnosis. By following this structured approach, you can effectively identify and address the issues affecting your cruise control system.
What are the common problems that could cause the cruise control to stop working in a 1999 Porsche Boxster?
When troubleshooting cruise control issues in a 1999 Porsche Boxster, several common problems may arise. One of the first things to check is the correct engagement of the system; ensure that you are pressing the cruise control button properly and that the indicator light on the speedometer illuminates. If the cruise control still does not engage, inspect the brake and clutch switches, as faulty switches can deactivate the system unexpectedly. Additionally, dirty or corroded electrical contacts can hinder functionality, so cleaning these connections is essential. It's also wise to verify that the indicator bulb in the instrument cluster is operational, as a burned-out bulb can mislead you into thinking there’s a more significant issue. If these steps do not resolve the problem, the cruise control unit itself may be malfunctioning, which can be diagnosed by testing the voltages at its connector. Lastly, examine the cable connecting the throttle to the cruise control unit for any signs of damage or disconnection, ensuring all connections are secure. By systematically addressing these common issues, you can effectively troubleshoot and potentially restore the cruise control functionality in your Porsche Boxster.
How urgent is it to address the non-functioning cruise control in a 1999 Porsche Boxster?
When evaluating the urgency of fixing a non-functioning cruise control in a 1999 Porsche Boxster, it's essential to recognize that while this issue does not pose an immediate safety risk, it can still impact your overall driving experience. The cruise control system is primarily a convenience feature designed to enhance comfort during long drives, reducing fatigue and allowing for a more relaxed journey. However, neglecting to address this malfunction could lead to increased driver fatigue on extended trips, which may indirectly affect your focus and alertness on the road. Additionally, troubleshooting the cruise control system is generally straightforward, involving checks on various components such as the brake pedal and clutch switches, as well as the cruise control stalk switch. While it is advisable to resolve the issue at your earliest convenience to restore the full functionality of your vehicle, it is not classified as an urgent repair. Therefore, you can prioritize this task alongside other maintenance needs without the pressure of immediate action.