2003 Jaguar XJR Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2003 Jaguar XJR 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 2003 Jaguar XJR 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 2003 Jaguar XJR 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.

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-functioning cruise control in a 2003 Jaguar XJR?

When troubleshooting a non-functioning cruise control in a 2003 Jaguar XJR, it's essential to adopt a systematic diagnostic approach that begins with the simplest checks before progressing to more complex issues. Start by examining the battery and electrical system; ensure the battery is in good condition and that the cables are free from corrosion, as these factors can significantly impact the vehicle's electrical components. Next, investigate the throttle system, focusing on the throttle body and throttle position sensor (TPS), as faults here can directly affect cruise control functionality. Don't overlook the brake system; a malfunctioning brake switch can disable cruise control, so ensure it is operating correctly. Additionally, check all related sensors and switches for any fault codes that may indicate underlying issues. It's also wise to inspect for vacuum leaks in the intake system, as these can indirectly influence the cruise control's performance. If your vehicle features adaptive cruise control, ensure that the radar unit is unobstructed and properly aligned. Lastly, be aware of any warning messages related to wheel speed sensors, as these can also impact cruise control operation. By following this structured approach, you can effectively diagnose and resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2003 Jaguar XJR?

When troubleshooting cruise control issues in a 2003 Jaguar XJR, it's essential to consider several common problems that may be affecting the system's functionality. Start by examining the battery and voltage levels, as a weak battery or faulty alternator can disrupt power to the cruise control. Next, inspect the throttle system, particularly the throttle position sensor, which can trigger fault codes and disable the cruise control if malfunctioning. Additionally, the brake system should be checked; a defective brake switch can inadvertently signal the cruise control to disengage. It's also important to assess the various sensors and switches associated with the cruise control system, as any failures here can lead to operational issues. Grounding problems can further complicate matters, so ensure that all earth points are clean and secure. If your vehicle features adaptive cruise control, be mindful of potential blockages or misalignments in the radar unit, as these can prevent the system from functioning correctly. By systematically addressing these areas, you can effectively diagnose and resolve cruise control malfunctions in your Jaguar XJR.

How urgent is it to repair the non-functioning cruise control on a 2003 Jaguar XJR?

While repairing the non-functioning cruise control on a 2003 Jaguar XJR may not seem urgent from a safety perspective, it is advisable to address the issue sooner rather than later. The absence of cruise control can lead to increased driver fatigue during long trips, making the driving experience less enjoyable. Moreover, the underlying causes of the malfunction—such as problems with the control module, sensors, or brake pedal switch—could indicate broader issues that may require attention. Although these problems are not critical safety concerns, neglecting them could lead to more significant complications down the line. Therefore, while you may not need to rush to the repair shop, taking the time to diagnose and fix the cruise control system can enhance your vehicle's overall functionality and ensure that any potential issues are resolved before they escalate.

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.

2003 Jaguar XJR Cruise Control Issues & Repair Costs