2005 Cadillac XLR Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Cadillac XLR and How to Fix Them

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Reviewed by
Bo Fader
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 2005 Cadillac XLR 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 2005 Cadillac XLR 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.

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 steps to diagnose the cruise control issue in a 2005 Cadillac XLR?

To effectively diagnose a cruise control issue in a 2005 Cadillac XLR, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse to rule out any electrical issues; a blown fuse can often be the simplest fix. Next, examine the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are essential for operation. Utilizing an OBD-II scanner can provide valuable insights by revealing any error codes that may indicate specific problems within the system. Following this, check the speed sensors, as they are critical for the cruise control to function correctly. The brake pedal switch should also be tested, since it plays a vital role in disengaging the cruise control when the brakes are applied. Additionally, inspect the vacuum lines for leaks or damage, as these can significantly impact performance. Finally, ensure that all wiring connections are secure and free from corrosion. If these steps do not resolve the issue, it may be prudent to consult a professional mechanic who specializes in Cadillac vehicles for further assistance. This methodical approach not only helps in identifying the problem but also saves time and resources in the DIY process.

What are the common problems that could cause the cruise control to stop working in a 2005 Cadillac XLR?

When dealing with cruise control issues in a 2005 Cadillac XLR, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, a defective brake pedal switch can cause the cruise control to deactivate unexpectedly, as this switch is designed to interrupt the system when the brakes are applied. Another potential issue is a blown fuse within the cruise control circuit, which can completely disrupt its functionality. Furthermore, vacuum leaks can significantly affect the system's performance, preventing it from maintaining speed effectively. Lastly, a malfunctioning speed sensor can lead to inaccurate speed readings, causing the cruise control to fail. By identifying and addressing these issues, DIYers can restore the cruise control system to its proper working condition, enhancing the driving experience in their Cadillac XLR.

How urgent is it to repair the non-functioning cruise control in a 2005 Cadillac XLR?

Repairing the non-functioning cruise control in a 2005 Cadillac XLR should be approached with a sense of urgency, primarily due to the safety implications it carries. While it may not seem like an immediate emergency, the absence of cruise control can lead to increased driver fatigue and distraction, particularly during long drives, which can elevate the risk of accidents. Additionally, the comfort and convenience that cruise control provides are significant; without it, drivers must constantly monitor and adjust their speed, which can be tiresome and detract from the overall driving experience. Furthermore, neglecting this repair could impact the vehicle's resale value, as potential buyers often look for well-maintained features. Therefore, addressing the cruise control issue promptly not only enhances safety and comfort but also preserves the vehicle's overall condition and marketability.

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