2004 Jaguar XJ8 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2004 Jaguar XJ8 and How to Fix Them

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Reviewed by

Aisha

Written by RepairPal Car Genius

Updated January 14, 2025

30% chance it's the

Sensor

25% chance it's the

Control Module

25% chance it's the

Throttle

20% chance it's

Something else

The most common reasons a 2004 Jaguar XJ8 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.

What are the best Jaguar repair shops?

RepairPal Certified shops can diagnose and repair your 2004 Jaguar XJ8 electronics and electrical issues. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

How much does it cost to fix a 2004 Jaguar XJ8 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

How urgent is it to repair the non-functioning cruise control on a 2004 Jaguar XJ8?

Repairing the non-functioning cruise control on a 2004 Jaguar XJ8 should be considered a priority for any DIY enthusiast, as neglecting this issue can lead to increased discomfort and potential safety risks during long drives. The convenience of cruise control allows drivers to maintain a steady speed, reducing fatigue and strain on the foot from constant gas pedal use. If left unaddressed, the malfunction could exacerbate driving discomfort, especially on highways where maintaining a consistent speed is crucial. Additionally, while some repairs may seem minor, ignoring symptoms like a faulty speed sensor or brake pedal switch can lead to more significant issues down the line, potentially resulting in costly repairs. Therefore, addressing cruise control problems promptly not only enhances driving comfort but also ensures a safer driving experience, making it an essential task for those who value both convenience and safety on the road.

Related 2004 Jaguar XJ8 Problems

Read about related problems experienced by other Jaguar XJ8 drivers like you.

Jaguar XJ8 fuel pump failure causing stalling and no start issue

Some Jaguar XJ8 owners report experiencing stalling and no-start issues, often attributed to a failing fuel pump. These owners note that a malfunctioning fuel pump can cause insufficient pressure in the fuel system, leading to difficulties in starting the vehicle and unexpected stalling. Symptoms they report include the engine turning over without firing, issues with the key fob, and potential alarm system malfunctions. Additionally, some owners find that if the fuel pump is not functioning properly, the engine may not receive the necessary fuel for ignition. To diagnose these issues, testing for power at the fuel pump fuse and during ignition is recommended. In some cases, even after replacing the fuel pump relay, owners may encounter ongoing power or control issues, suggesting a more complex problem within the fuel system. Addressing these concerns promptly is essential for resolving the stalling and no-start problems.

2 model years affected

Avg Mileage: 182,940

8 others reported problem

4 comments

Mitsubishi Diamante cruise control malfunction after drive line obstruction removal

Some Mitsubishi Diamante owners report experiencing cruise control malfunctions after removing a drive line obstruction, often linked to issues with the control module, sensor, or switch. These problems may stem from failed components that prevent the cruise control system from engaging or holding speed, despite power being available to the dash and fuse. Additionally, throttle actuation issues, such as a faulty throttle position sensor, can lead to the engine's computer overcompensating with fuel, which may result in black exhaust from the tailpipe. Owners are advised to thoroughly troubleshoot the cruise control system and inspect key components like the control module, sensor, and throttle to identify any damage or malfunction caused during the obstruction removal process.

4 model years affected

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