2015 Ram ProMaster 1500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Ram ProMaster 1500 and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 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 2015 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 cruise control issue in a 2015 Ram ProMaster 1500?

When diagnosing a cruise control issue in a 2015 Ram ProMaster 1500, it's crucial to follow a methodical diagnostic approach that emphasizes simpler checks before tackling more complex problems. Start by examining the cruise control fuse, as a blown fuse can disrupt the entire system. Next, check the functionality of the cruise control buttons on the steering wheel, since malfunctioning buttons can hinder engagement. Utilizing a diagnostic scanner to retrieve any error codes from the vehicle's onboard computer can provide critical insights into specific issues affecting the cruise control system. After that, inspect the vehicle speed sensor, as a faulty sensor may prevent the cruise control from maintaining a set speed. It's also important to verify that the brake and clutch switches are working properly, as defective switches can cause the cruise control to disengage unexpectedly. Lastly, thoroughly inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as compromised wiring can severely impact functionality. By adhering to this structured approach, you can effectively pinpoint and resolve the underlying causes of cruise control issues in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2015 Ram ProMaster 1500?

When dealing with cruise control issues in a 2015 Ram ProMaster 1500, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, problems with the speed sensor can hinder the cruise control's ability to maintain a constant speed, as this component is crucial for its operation. A blown fuse related to the cruise control system is another simple yet often overlooked issue that can cause the system to fail. Furthermore, a malfunction in the throttle control system, such as a faulty throttle position sensor, can disrupt the cruise control's functionality. The Electronic Control Module (ECM) also plays a vital role; any issues here can significantly impact the cruise control's performance. Lastly, it's important to check for wiring or connection problems, as damaged or corroded wiring can disrupt communication between the various components of the cruise control system. By systematically addressing these potential issues, DIYers can effectively diagnose and resolve cruise control malfunctions in their Ram ProMaster 1500.

How urgent is it to address the non-functioning cruise control in a 2015 Ram ProMaster 1500?

Addressing a non-functioning cruise control in your 2015 Ram ProMaster 1500 should be a priority, even if it may not seem like an immediate safety concern. The cruise control system is designed to enhance driving comfort, particularly during long trips, by allowing you to maintain a steady speed without constant pedal pressure. When this feature fails, it can lead to driver fatigue and inconvenience, especially on highways where consistent speed is beneficial. While the malfunction may not pose an immediate risk, neglecting it could result in further complications, such as potential damage to the vehicle's electrical system, which could lead to more expensive repairs down the line. Therefore, it is advisable to investigate the issue sooner rather than later, ensuring that all vehicle systems are functioning properly and maintaining the overall safety and efficiency of your driving experience. Taking the time to address this problem can save you from future headaches and ensure a smoother ride.

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