2005 Ford Mustang Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Ford Mustang and How to Fix Them

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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 2005 Ford Mustang 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 2005 Ford Mustang 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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-functional cruise control in a 2005 Ford Mustang?

When faced with a non-functional cruise control in a 2005 Ford Mustang, it's crucial to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, inspect the wiring for any signs of damage or loose connections, as these can disrupt the system's functionality. Testing the cruise control switch is also essential; a malfunctioning switch can prevent the system from engaging altogether. If your Mustang utilizes a vacuum system for cruise control, examine the vacuum lines for any leaks or blockages that could hinder performance. Additionally, using a diagnostic scanner to check for error codes can provide valuable insights into specific problems affecting the cruise control. Lastly, ensure that the speed sensors are functioning correctly, as they play a vital role in maintaining the desired speed. By following these steps, you can effectively troubleshoot and potentially resolve the cruise control issues in your Mustang, empowering you to take control of your vehicle's performance.

What are the common problems that could cause the cruise control to stop working in a 2005 Ford Mustang?

When the cruise control in a 2005 Ford Mustang ceases to function, several common problems may be at play. One of the first areas to check is the control module, as a failure here can disrupt the entire system. Additionally, issues with sensors or switches, particularly those related to throttle actuation, can prevent the cruise control from engaging properly. It's also essential to inspect the vehicle's fuses, as a blown fuse can interrupt the power supply necessary for the cruise control to operate. Another critical component to examine is the brake pedal position sensor; if this sensor is malfunctioning, it may incorrectly signal that the brakes are engaged, thereby disabling the cruise control. Furthermore, problems with the throttle body or the PRNDL/shifter position switch can also lead to functionality issues. Lastly, ensure that the brake lights are working correctly, as a faulty brake switch can interfere with the cruise control system. By systematically checking these components, DIYers can effectively diagnose and address the underlying issues affecting their Mustang's cruise control.

How urgent is it to address the non-functioning cruise control in a 2005 Ford Mustang?

When considering the urgency of fixing a non-functioning cruise control in a 2005 Ford Mustang, it is crucial to recognize the safety implications involved. A malfunctioning cruise control can lead to erratic speed changes, which pose a significant risk, particularly on highways where maintaining a steady speed is essential for safe driving. Additionally, the comfort and convenience that cruise control provides during long trips cannot be overlooked; without it, drivers may experience increased fatigue and stress, detracting from the overall driving experience. Furthermore, neglecting this issue can adversely affect the vehicle's resale value. Prospective buyers often look for well-maintained features, and a non-operational cruise control could be a red flag. Therefore, while it may not seem like an immediate emergency, addressing the cruise control issue promptly is advisable to ensure safety, enhance comfort, and preserve the Mustang's value.

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