2021 Ram ProMaster City Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Ram ProMaster City

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Reviewed by
Andrew Hajjar
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 ProMaster City 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 ProMaster City 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 ProMaster City?

When troubleshooting the non-functioning cruise control in a 2021 Ram ProMaster City, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's functionality. Next, verify that the cruise control settings are correctly configured according to the vehicle's manual, ensuring that the system is activated properly. If these initial checks do not resolve the issue, use a diagnostic scanner to look for any error codes that may indicate specific problems within the cruise control system. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as stuck buttons can prevent the system from engaging. It's also crucial to test the brake pedal switch, since the cruise control is designed to disengage when the brake is pressed; a faulty switch could be the culprit. Finally, ensure that the vehicle speed sensor is functioning correctly, as it provides essential speed data to the cruise control system. By following these steps, you can effectively diagnose and potentially resolve the issue with your cruise control system.

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

When the cruise control in your 2021 Ram ProMaster City ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another potential issue is a blown fuse; if the fuse linked to the cruise control system is damaged, it can disrupt the entire operation. Additionally, the brake light switch plays a vital role in the cruise control mechanism; if this switch is malfunctioning, it may prevent the system from engaging or disengaging as intended. Furthermore, a malfunctioning throttle actuator can hinder the cruise control's ability to adjust the engine throttle, leading to operational failures. Lastly, a defective cruise control module can also be a significant factor in the system's failure. By systematically checking these components, you can identify and potentially resolve the issues affecting your cruise control system, making your DIY troubleshooting efforts more effective.

How urgent is it to address the non-functioning cruise control in a 2021 Ram ProMaster City?

Addressing a non-functioning cruise control in your 2021 Ram ProMaster City is crucial for several reasons. First and foremost, cruise control enhances driving comfort by allowing you to maintain a steady speed, which is especially beneficial during long trips. When this feature fails, it not only increases driver fatigue but can also lead to erratic speed control, potentially compromising safety on the road. Moreover, a malfunctioning cruise control system may signal deeper issues within the vehicle's electronic or engine control systems, which could escalate into more significant problems if left unchecked. Ignoring this symptom could result in inconvenient driving experiences and may even affect your vehicle's overall performance and fuel efficiency. Therefore, it is essential to prioritize the repair of your cruise control system to ensure both your safety and the longevity of your vehicle.

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