2008 Dodge Magnum Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2008 Dodge Magnum 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 2008 Dodge Magnum 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 2008 Dodge Magnum 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.

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 2008 Dodge Magnum?

When troubleshooting the non-functioning cruise control in a 2008 Dodge Magnum, it's important to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can prevent the system from operating. Next, verify the functionality of the cruise control switch; a malfunctioning switch can hinder engagement. It's also crucial to examine the brake pedal switch, which is responsible for disengaging the cruise control when the brakes are applied; any faults here can lead to operational problems. Additionally, inspect the vehicle speed sensor, as it provides essential data for maintaining speed; a faulty sensor can disrupt the cruise control's performance. Finally, using a diagnostic scanner to check for error codes can help identify specific issues affecting the cruise control system. By following these steps, you can effectively diagnose and potentially resolve the cruise control issues in your Dodge Magnum, empowering you to tackle the problem with confidence.

What are the common problems that could cause the cruise control to stop working in a 2008 Dodge Magnum?

When the cruise control in a 2008 Dodge Magnum ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a failed control module, which is essential for the cruise control system's operation. Additionally, sensor or switch malfunctions can disrupt the system's ability to engage. Throttle actuation problems may also arise, preventing the vehicle from maintaining speed. Another area to check is the vacuum release valve, as issues here can lead to a loss of control. It's also wise to inspect the fuse related to the cruise control, as a blown fuse can easily disable the system. Lastly, a faulty brake light or brake switch can inadvertently signal that the brakes are engaged, which will deactivate cruise control. If the check engine light is illuminated, it may indicate underlying engine-related problems that could affect the cruise control's performance. By systematically examining these components, you can identify and resolve the issue, restoring functionality to your cruise control system.

How urgent is it to address the non-functioning cruise control in a 2008 Dodge Magnum?

When it comes to the non-functioning cruise control in your 2008 Dodge Magnum, understanding the urgency of the repair is crucial. If you often embark on long highway drives, the convenience of cruise control becomes a significant factor in your driving experience, making it more pressing to resolve any issues. Conversely, if your driving primarily consists of short trips or stop-and-go traffic, you might feel less urgency. However, it's essential to recognize that a malfunctioning cruise control system could signal deeper problems within your vehicle, such as issues with the brake pedal, throttle body, or electrical components. Ignoring these symptoms not only compromises your comfort but could also lead to safety risks or more extensive damage over time. Therefore, regardless of your driving habits, it is wise to consult a repair manual or a qualified mechanic to diagnose the root cause of the malfunction. Addressing the issue promptly ensures not only the functionality of your cruise control but also the overall health and safety of your vehicle.

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