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.
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.
To effectively diagnose the non-functioning cruise control in your 2001 Ford Expedition, begin by inspecting the vacuum lines connected to the intake and brake booster. A vacuum leak can significantly hinder the performance of the cruise control system, so ensuring these lines are intact is crucial. Next, utilize the Self-Test Diagnostics mode to gain insights into the system's functionality. To enter this mode, press the speed control OFF switch while turning the ignition key to the ON position without starting the engine. This process will help you identify any error codes or malfunctions within the cruise control system. By starting with these straightforward checks, you can systematically narrow down the potential causes of the issue, making it easier to implement further repairs if necessary.
When troubleshooting the cruise control system in a 2001 Ford Expedition, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging. Another frequent issue is a defective speed sensor, which is crucial for maintaining a constant speed; without accurate readings, the cruise control may not function correctly. Additionally, vacuum leaks can significantly impact the system's performance, as they can lead to a loss of vacuum pressure necessary for operation. It's also important to consider the cruise control module itself, as any defects or damage to this component can hinder the system's functionality. Lastly, electrical issues, such as blown fuses or wiring problems, can disrupt the cruise control's operation. By systematically checking these areas, you can effectively diagnose and potentially resolve the issues affecting your vehicle's cruise control system.
When it comes to a non-functioning cruise control in a 2001 Ford Expedition, the urgency of addressing the issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks, especially during long drives or highway travel where cruise control is typically utilized. A malfunctioning cruise control system may be indicative of deeper issues within the vehicle's electrical system or sensors, which could compromise overall vehicle performance. Furthermore, ignoring these symptoms can result in more extensive damage over time, leading to higher repair costs and potential safety hazards. Therefore, it is crucial to have the cruise control system inspected by a qualified mechanic as soon as possible to ensure the vehicle remains safe and reliable for all driving conditions.
See what others are asking about their Ford Expedition. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Ford Expedition drivers like you.
