2015 Ram ProMaster 2500 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2015 Ram ProMaster 2500

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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 2015 Ram ProMaster 2500 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 2500 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 2500?

To effectively diagnose a cruise control issue in a 2015 Ram ProMaster 2500, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse to ensure it is intact, as a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are essential for operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying electronic issues. Additionally, verify the performance of the speed sensors, as they are critical for the cruise control system to function correctly. The brake pedal switch should also be tested, since it plays a vital role in disengaging cruise control when the brakes are applied. Finally, inspect all wiring connections related to the cruise control system for any loose or damaged wires that could be causing the problem. If these steps do not yield results, seeking assistance from a professional mechanic with experience in Ram ProMaster vehicles may be necessary to ensure a thorough diagnosis and repair.

What are the common problems that could cause the cruise control to stop working in a 2015 Ram ProMaster 2500?

When the cruise control in your 2015 Ram ProMaster 2500 stops functioning, it can be frustrating, but understanding the common problems can help you diagnose and potentially fix the issue yourself. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control system as it disengages the system when the brake pedal is pressed. If this switch is malfunctioning, it may prevent the cruise control from engaging at all. Another common issue is related to the speed sensor; if this component is not providing accurate speed readings, the cruise control may not work properly or could disengage unexpectedly. Additionally, vacuum leaks within the cruise control system can disrupt its ability to maintain a set speed, leading to erratic behavior. A defective cruise control module can also be a significant factor, as it is responsible for the overall operation of the system. Lastly, don’t overlook potential electrical problems, such as blown fuses or wiring issues, which can severely impact the functionality of the cruise control. By systematically checking these areas, you can effectively troubleshoot and resolve the issues with your cruise control system.

How urgent is it to diagnose and repair the non-functioning cruise control on a 2015 Ram ProMaster 2500?

While a non-functioning cruise control on a 2015 Ram ProMaster 2500 may not present an immediate safety risk, it is crucial to recognize the importance of diagnosing and repairing the issue promptly. Ignoring this malfunction could lead to more significant problems within the vehicle's electronic systems, potentially affecting other critical functions. The cruise control system relies on various sensors and modules, and a failure in this area may indicate underlying issues that could escalate if left unaddressed. Moreover, timely repairs not only ensure the vehicle operates at its best but also help prevent future complications that could arise from neglecting the problem. Therefore, while the urgency may not be critical, addressing the cruise control malfunction is advisable to maintain optimal vehicle performance and avoid any unforeseen safety concerns down the line.

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