2018 Land Rover Discovery Cruise Control Isn't Working

Fix Cruise Control Issues in Your 2018 Land Rover Discovery

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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 2018 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 2018 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 diagnostic steps to troubleshoot the non-functioning cruise control in a 2018 Land Rover Discovery?

When troubleshooting the non-functioning cruise control in a 2018 Land Rover Discovery, it's important to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the cruise control switch on the steering wheel for any signs of damage or wear, as this component is crucial for activating the system. Following this, examine the speed sensors, which are vital for the cruise control to function correctly; any issues here could disrupt the system's operation. Additionally, inspect the wiring connections associated with the cruise control system, looking for any loose or damaged wires that could be causing a disruption. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Finally, ensure that the brake and clutch switches are functioning properly, as these switches are designed to disengage the cruise control when either pedal is pressed. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2018 Land Rover Discovery?

When the cruise control in your 2018 Land Rover Discovery ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is faulty speed sensors, which are crucial for the system to maintain your desired speed; if these sensors are malfunctioning, the cruise control may not engage properly. Another common issue is a malfunctioning brake light switch, as this component is designed to deactivate the cruise control when the brakes are applied. Additionally, problems with the throttle control system can hinder the cruise control's ability to regulate speed effectively, leading to erratic behavior. Electrical issues, such as blown fuses or damaged wiring, can also disrupt the system's functionality, so it's wise to check these components. Lastly, vacuum leaks in the engine can affect the cruise control's operation by disrupting the necessary vacuum pressure. By systematically checking these areas, you can identify and potentially resolve the issue, restoring your vehicle's cruise control functionality.

How urgent is it to address the malfunctioning cruise control in a 2018 Land Rover Discovery?

Addressing a malfunctioning cruise control in a 2018 Land Rover Discovery is of utmost importance due to the significant safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can create dangerous driving conditions for both the driver and other road users. Additionally, ignoring these symptoms may not only compromise safety but can also result in decreased fuel efficiency and further damage to the vehicle's systems, leading to more costly repairs down the line. By promptly addressing the cruise control issue, you not only ensure the safe operation of your vehicle but also protect your investment from potential long-term damage. Therefore, it is crucial to take immediate action to diagnose and resolve any cruise control malfunctions to maintain both safety and vehicle performance.

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