2020 Ram ProMaster 1500 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2020 Ram ProMaster 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 2020 Ram ProMaster 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 2020 Ram ProMaster 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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-functional cruise control in a 2020 Ram ProMaster 1500?

When troubleshooting the non-functional cruise control in a 2020 Ram ProMaster 1500, it's crucial to follow a structured diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the cruise control fuse, as a blown fuse is a common and easily rectifiable problem that can disrupt the system's operation. Next, assess the cruise control switch to confirm its proper functionality, since a defective switch can prevent the system from engaging. It's also important to examine the vehicle's speed sensors, as they are integral to the cruise control's performance. Utilizing a diagnostic scanner to retrieve any error codes can offer valuable insights into potential malfunctions. Additionally, check the brake and clutch switches, as any faults in these components can inhibit the activation of cruise control. Lastly, inspect the wiring and connections related to the cruise control system for any signs of damage or loose connections, as these can also lead to operational failures. By systematically addressing these areas, 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 2020 Ram ProMaster 1500?

When troubleshooting cruise control issues in a 2020 Ram ProMaster 1500, it's essential to consider several common problems that could be at play. One of the primary culprits is faulty speed sensors, which can disrupt the system's ability to maintain the desired speed. Additionally, a defective cruise control switch may prevent the system from engaging or disengaging properly, leading to frustration during your drive. Another potential issue is a blown fuse, which can completely disable the cruise control functionality. It's also worth checking for vacuum leaks in the engine, as these can interfere with the system's operation. The brake light switch is another critical component; if it's malfunctioning, it may not allow the cruise control to activate, since the system is designed to disengage when the brakes are applied. Lastly, throttle-related issues, such as problems with the throttle position sensor or throttle body, can significantly impact cruise control performance. By systematically addressing these common issues, you can effectively diagnose and resolve cruise control problems in your vehicle.

How urgent is it to address the non-functioning cruise control in a 2020 Ram ProMaster 1500?

When it comes to a non-functioning cruise control in your 2020 Ram ProMaster 1500, understanding the urgency of the situation is crucial for both safety and vehicle performance. While it may not seem like an immediate threat, neglecting this issue can lead to a less enjoyable driving experience, particularly on long trips where cruise control is invaluable for reducing fatigue and improving fuel efficiency. Moreover, a malfunctioning cruise control system could be a symptom of deeper electronic issues within your vehicle, which, if left unaddressed, might escalate into more significant problems that could compromise your vehicle's overall functionality. Therefore, even if the cruise control system itself does not pose a direct safety risk, it is wise to prioritize its repair. By doing so, you not only enhance your driving comfort but also prevent potential complications that could arise from ignoring the problem. For DIY enthusiasts, this means taking the time to troubleshoot the system, checking for common issues such as blown fuses or faulty sensors, and seeking professional help if necessary to ensure your vehicle remains in optimal condition.

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2020 Ram ProMaster 1500 Cruise Control Issues & Repairs