1999 Volkswagen Passat Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 1999 Volkswagen Passat and How to Fix Them

Find Repair Location
Reviewed by
Andrew Hajjar
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 1999 Volkswagen Passat 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 1999 Volkswagen Passat 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 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1999 Volkswagen Passat?

When troubleshooting the non-functional cruise control in a 1999 Volkswagen Passat, it's crucial to adopt a systematic diagnostic approach. Start by checking the fuse box for any blown fuses related to the cruise control system, as this is a simple fix that can often resolve the issue. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Additionally, verify that the brake lights are functioning correctly, since a faulty brake light switch can inadvertently disable the cruise control. It's also important to examine the throttle cable and linkage for any obstructions or damage that might hinder the system's performance. Finally, consider scanning the vehicle's onboard diagnostic system for error codes that could provide further insight into the problem. By following these steps, you can effectively diagnose and potentially resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1999 Volkswagen Passat?

When troubleshooting the cruise control system in a 1999 Volkswagen Passat, it's essential to understand the common problems that may lead to its failure. One of the primary issues could be a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is pressed; if this switch malfunctions, it can prevent the system from engaging. Additionally, problems with the speed sensor can disrupt the system's ability to maintain a consistent speed, as it relies on accurate readings to function correctly. Another potential culprit is vacuum leaks within the cruise control system, which can occur in hoses or connections, ultimately affecting its performance. A defective cruise control module may also be responsible, as it plays a crucial role in communicating with the engine to control speed. Lastly, electrical problems, such as blown fuses or wiring issues, can hinder the system's operation. By systematically addressing these common issues, DIY enthusiasts can effectively troubleshoot and repair the cruise control system, restoring its functionality and enhancing the driving experience.

How urgent is it to repair the non-functioning cruise control in a 1999 Volkswagen Passat?

Repairing the non-functioning cruise control in a 1999 Volkswagen Passat should be considered a priority due to its implications for safety and overall driving experience. A malfunctioning cruise control system can lead to increased driver fatigue, as maintaining a consistent speed becomes a manual task, which can distract from the road and elevate the risk of accidents. Additionally, the convenience that cruise control offers, especially during long drives, cannot be overlooked; it allows for a more relaxed driving experience by reducing the need for constant speed adjustments. Furthermore, from a financial perspective, a vehicle with all its features functioning properly tends to retain a higher resale value. Therefore, while it may not seem immediately critical, addressing the cruise control issue is essential for ensuring safe driving, enhancing comfort, and preserving the vehicle's market value in the long run.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.