2021 Ram 1500 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2021 Ram 1500

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Reviewed by
Devin Cabugcal
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 Ram 1500 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 Ram 1500 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2021 Ram 1500?

When troubleshooting the non-functioning cruise control in a 2021 Ram 1500, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as this can also prevent engagement. Following this, verify the functionality of the vehicle's speed sensor, since the cruise control relies on accurate speed readings to maintain set speeds. If these initial checks do not reveal the issue, use a diagnostic scanner to look for any error codes that may indicate specific problems within the cruise control system. Additionally, check the brake lights, as a malfunctioning brake light switch can inhibit cruise control activation. Lastly, if your vehicle uses a vacuum-operated system, inspect the vacuum lines for any leaks or damage that could affect performance. By methodically working through these steps, you can effectively identify and address the cause of the cruise control malfunction in your Ram 1500.

What are the common problems that could cause the cruise control to stop working in a 2021 Ram 1500?

When troubleshooting the cruise control system in a 2021 Ram 1500, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since it is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to malfunction. A blown fuse in the cruise control circuit can also be a straightforward yet often overlooked reason for the system's failure. Furthermore, if the cruise control module itself is defective, it may fail to communicate effectively with other vehicle systems, resulting in operational issues. Lastly, problems with the throttle control can hinder the cruise control's performance, making it difficult to maintain the desired speed. By identifying and addressing these common issues, you can effectively diagnose and potentially resolve the cruise control problems in your Ram 1500.

How urgent is it to address the malfunctioning cruise control in a 2021 Ram 1500?

When it comes to a malfunctioning cruise control system in your 2021 Ram 1500, the urgency to address the issue cannot be overstated. A faulty cruise control can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. Ignoring these symptoms not only jeopardizes your safety but also that of other drivers and passengers. Moreover, delaying repairs can exacerbate the problem, potentially leading to more extensive damage to the vehicle's electronic systems, resulting in higher repair costs down the line. Therefore, it is crucial to have the cruise control system inspected and repaired by a qualified mechanic as soon as possible to ensure your vehicle operates safely and reliably. Taking prompt action not only protects you but also helps maintain the integrity of your vehicle, ensuring a safer driving experience.

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