2018 Ram ProMaster City Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Ram ProMaster City and How to Fix Them

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Reviewed by
Bo Fader
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 2018 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 2018 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 steps to diagnose the cruise control issue in a 2018 Ram ProMaster City?

When diagnosing a cruise control issue in a 2018 Ram ProMaster City, it's crucial to follow a methodical diagnostic approach that prioritizes simpler solutions before tackling more complex problems. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are functioning correctly and are not stuck or damaged, as this can hinder proper engagement. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues within the vehicle's onboard computer. Additionally, examining the speed sensors is essential, as any malfunction here can directly affect cruise control performance. It's also important to inspect wiring connections for any signs of damage or looseness, as these can lead to system failures. If these preliminary checks do not resolve the issue, testing the cruise control module will help determine if it is sending the correct signals. Should the problem persist after these steps, consulting a professional mechanic with expertise in cruise control systems is advisable for a thorough diagnosis and repair. By adhering to this structured approach, you can effectively identify and address cruise control issues in your vehicle, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2018 Ram ProMaster City?

When troubleshooting cruise control issues in a 2018 Ram ProMaster City, it's essential to understand the common problems that may be at play. A faulty cruise control switch is often the first suspect, as it can hinder the system's ability to engage or disengage properly. Additionally, a blown fuse in the vehicle's electrical system can disrupt the cruise control function, making it crucial to check the fuse box for any issues. Another potential culprit is the speed sensor; if it malfunctions, the cruise control may struggle to maintain a constant speed. Furthermore, problems with the brake light switch can lead to unexpected disengagement of the cruise control when the brakes are applied, which can be frustrating for drivers. Lastly, the throttle actuator, responsible for controlling engine speed, can also fail, impacting the cruise control's performance. By identifying and addressing these common issues, you can effectively restore the cruise control functionality in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2018 Ram ProMaster City?

When it comes to a malfunctioning cruise control in a 2018 Ram ProMaster City, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unpredictable acceleration or deceleration, creating a significant safety hazard on the road. This unpredictability not only compromises the driver's ability to maintain a steady speed, which is essential for safe driving, especially during long trips, but it can also increase the risk of accidents. Furthermore, neglecting these symptoms can result in decreased fuel efficiency and accelerated wear on the vehicle's components, leading to more extensive and costly repairs down the line. Therefore, it is crucial to diagnose and repair cruise control issues as soon as they arise, ensuring both the safety of the driver and passengers and the overall performance of the vehicle. Taking prompt action can prevent minor issues from escalating into major problems, making it a wise decision for any DIY enthusiast or vehicle owner.

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