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.
When it comes to the non-functioning cruise control in a 2009 Mercury Mariner, understanding the urgency of the situation is crucial for both safety and convenience. While it may not seem like an immediate emergency, neglecting this issue can lead to more significant problems down the line. For instance, a malfunctioning cruise control system could be indicative of underlying electrical issues or sensor failures that might affect other critical vehicle functions. Additionally, since cruise control is designed to enhance driving comfort, especially on long trips, its absence can lead to increased driver fatigue and discomfort. DIY enthusiasts should be aware that common culprits behind cruise control failures include blown fuses, faulty brake switches, and malfunctioning speed sensors, all of which can be diagnosed and potentially repaired at home with the right tools and knowledge. However, if the problem persists or is linked to safety systems like ABS or throttle control, it is advisable to consult a certified service center. Addressing these issues promptly not only ensures a more enjoyable driving experience but also helps maintain the overall health of your vehicle, preventing costly repairs in the future.
Read about related problems experienced by other Mercury Mariner drivers like you.
See what others are asking about their Mercury Mariner. Get answers from RepairPal's community of auto experts and enthusiasts.