2000 Mazda Protege Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2000 Mazda Protege 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 2000 Mazda Protege 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 2000 Mazda Protege 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.

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.

If the cruise control refuses to turn on at all, the actuator could be at fault. Likewise, if the cruise control stays on but does not maintain a consistent speed, the problem could be a bad actuator. In extreme cases, a malfunctioning actuator could cause the throttle to stick and prevent the vehicle from slowing down. These symptoms may point to a bad actuator. They may also point to other problems with the cruise control and related systems.

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 2000 Mazda Protege?

To troubleshoot the non-functional cruise control in a 2000 Mazda Protege, start by checking the cruise control fuse in the fuse box to ensure it is intact. A blown fuse can often be the simplest fix. Next, inspect the cruise control switch on the steering wheel for any signs of damage or wear, as a malfunctioning switch can prevent the system from engaging. If the switch appears to be in good condition, move on to the brake pedal switch; it should engage and disengage properly when the brake pedal is pressed, as this is crucial for cruise control operation. For manual transmission vehicles, don’t forget to check the clutch pedal switch as well, since it plays a similar role. Finally, using an OBD-II scanner can help you identify any error codes related to the cruise control system, providing further insight into the problem. By following these steps, you can systematically diagnose and potentially resolve the issue with your cruise control.

What are the common problems that could cause the cruise control to stop working in a 2000 Mazda Protege?

When troubleshooting the cruise control system in a 2000 Mazda Protege, it's essential to understand the common problems that may lead to its malfunction. One of the primary culprits could be a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to operate, while vacuum leaks in the engine can hinder its ability to maintain a consistent speed. Another critical component is the speed sensor; if it is defective, the cruise control may struggle to regulate speed effectively. Furthermore, issues with the brake light switch can cause the system to disengage unexpectedly when the brakes are applied, and a malfunctioning throttle cable can impede the cruise control's ability to adjust the vehicle's speed accurately. Identifying these potential issues can help you diagnose the problem more effectively, but for a thorough assessment and repair, consulting a professional mechanic is recommended.

How urgent is it to address the non-functioning cruise control in a 2000 Mazda Protege?

When it comes to the non-functioning cruise control in a 2000 Mazda Protege, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety of the vehicle may not be compromised, neglecting this issue can lead to more significant problems down the line. The cruise control system is not just a convenience; it is integrated with the vehicle's electrical and sensor systems, which means that a malfunction could indicate deeper issues that might affect overall vehicle performance. If left unchecked, these underlying problems could escalate, potentially leading to costly repairs or even safety risks in the future. Therefore, while it may not be an emergency, it is advisable to inspect and repair the cruise control system promptly. This proactive approach not only ensures a smoother driving experience but also helps maintain the integrity of your vehicle, preventing further complications that could arise from ignoring the symptoms.

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2000 Mazda Protege Cruise Control Issues & Repair Options