2021 Land Rover Discovery Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2021 Land Rover Discovery and How to Fix Them

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Reviewed by
Aisha
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 2021 Land Rover Discovery 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 2021 Land Rover Discovery 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 steps to diagnose the cruise control issue in a 2021 Land Rover Discovery?

To effectively diagnose cruise control issues in your 2021 Land Rover Discovery, begin with a methodical approach that emphasizes simplicity and accessibility. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to malfunctions. If these initial checks do not reveal the problem, utilize a diagnostic scanner to identify any error codes from the vehicle's onboard computer, which can provide insights into specific issues affecting the cruise control system. Additionally, verify the functionality of the vehicle speed sensor, as it is essential for the cruise control to operate correctly. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for any signs of damage or corrosion that could impede performance. By following these steps, you can systematically identify and address the root cause of the cruise control issue, empowering you to resolve the problem effectively.

What are the common problems that could cause the cruise control to stop working in a 2021 Land Rover Discovery?

When the cruise control in a 2021 Land Rover Discovery ceases to function, it can be attributed to several common issues that are often manageable for DIY enthusiasts. One primary culprit is faulty speed sensors, which are essential for the cruise control system to accurately gauge the vehicle's speed; if these sensors fail, the system may not operate correctly. Another frequent issue is a malfunctioning brake light switch, which is designed to deactivate cruise control when the brakes are engaged; if this switch is defective, it can inadvertently disable the system. Additionally, a blown fuse can completely halt the cruise control's operation, making it a straightforward fix for those familiar with vehicle electrical systems. Throttle control problems, particularly with the throttle position sensor, can also disrupt the cruise control's ability to maintain speed, while various electrical issues, such as wiring faults or a malfunctioning control module, can lead to system failure. By understanding these common problems, DIYers can effectively troubleshoot and address the issues, potentially restoring the cruise control functionality without the need for professional assistance.

How urgent is it to address the non-functioning cruise control in a 2021 Land Rover Discovery?

Addressing a non-functioning cruise control in a 2021 Land Rover Discovery is crucial for both safety and vehicle performance. When this feature fails, it may not only lead to increased driver fatigue during long drives but could also signal deeper electronic or sensor issues that, if ignored, might escalate into more significant problems. The cruise control system is designed to enhance driving comfort and efficiency, and its malfunction can compromise these benefits, potentially leading to unsafe driving conditions. Moreover, neglecting this issue could result in further damage to the vehicle's systems, which may require costly repairs down the line. Therefore, it is essential to prioritize the repair of the cruise control system to maintain the vehicle's reliability and ensure a safe driving experience.

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