2021 Ram ProMaster 1500 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Ram ProMaster 1500

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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 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 2021 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 steps to diagnose the non-functioning cruise control in a 2021 Ram ProMaster 1500?

To effectively diagnose the non-functioning cruise control in your 2021 Ram ProMaster 1500, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are responsive and not malfunctioning, as faulty buttons can prevent engagement. Following this, verify the speed sensor's functionality, since a defective sensor can disrupt the cruise control's ability to maintain speed. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues affecting the system. Additionally, check the brake and clutch switches, as these components are crucial for disengaging the cruise control when necessary. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or loose connections, as these can lead to malfunctions. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your vehicle.

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

When dealing with cruise control issues in a 2021 Ram ProMaster 1500, it's essential to understand the common problems that could be at play. One frequent culprit is a faulty speed sensor, which can disrupt the system's ability to gauge the vehicle's speed accurately, leading to cruise control failure. Additionally, a blown fuse can interrupt the electrical circuit necessary for the cruise control to function, making it a straightforward issue to check and replace. Another critical component is the brake light switch; if this switch is malfunctioning, it may prevent the cruise control from engaging, as the system is designed to deactivate when the brakes are applied. Furthermore, problems with the throttle actuator or throttle position sensor can hinder the cruise control's ability to maintain a steady speed, while vacuum leaks in the engine can also impact its performance by disrupting the necessary vacuum pressure. By systematically examining these areas, you can effectively troubleshoot and resolve cruise control issues in your vehicle, ensuring a smoother driving experience.

How urgent is the repair of the non-functioning cruise control in a 2021 Ram ProMaster 1500?

When it comes to the repair of a non-functioning cruise control system in a 2021 Ram ProMaster 1500, understanding the urgency of the situation is crucial. While it may not seem like an immediate emergency, neglecting this repair can lead to significant safety risks and affect the overall driving experience. A malfunctioning cruise control system can indicate deeper electronic issues within the vehicle, which could compromise other critical functions. Moreover, without cruise control, drivers may experience increased fatigue during long trips, which can lead to decreased focus and potential accidents. Timely diagnosis and repair not only enhance driving comfort but also prevent further complications that could arise from ignoring the problem. Therefore, addressing the cruise control issue promptly is essential for maintaining both safety and vehicle performance.

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2021 Ram ProMaster 1500 Cruise Control Issues & Repair Costs