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.
A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.
When troubleshooting cruise control issues in your Land Rover Range Rover, begin with a thorough inspection of the vacuum lines, as perishing or leaks in these lines are common culprits that can disrupt the system's functionality. Next, check the throttle sensor and ensure that the cable adjustments for both the throttle and cruise control are correct, as improper settings can lead to operational problems. It's also essential to examine the switches associated with the cruise control system; defects in these components can trigger various alerts and malfunctions. Don’t overlook the importance of fuses; inspect all related fuses, even those that may not seem directly linked to cruise control, to rule out any blown fuses that could be causing the issue. If the cruise control remains non-functional despite the dashboard indicators working, consider replacing the vacuum lines connected to the cruise control system as a final troubleshooting step. By following this diagnostic approach, you can systematically identify and resolve the issues affecting your vehicle's cruise control system.
When experiencing cruise control malfunctions in a Land Rover Range Rover, it's essential to consider several common problems that could be at play. One frequent issue is the failure of the throttle sensor, which can disrupt the communication between the accelerator and the cruise control system, leading to erratic behavior or complete failure. Additionally, a faulty cruise control module may prevent the system from engaging properly, while issues with the Forward Alert Sensor can also trigger faults. Another critical component to inspect is the vacuum pump; leaks or malfunctions here can significantly impact the cruise control's functionality. Furthermore, electronic control units (ECUs) are vital for the system's operation, and any faults within these units can result in malfunctions. Lastly, if you notice persistent issues, it may be worth checking the vacuum lines on the passenger side, as replacing these can sometimes resolve non-functional cruise control. By understanding these common problems, DIY enthusiasts can better diagnose and address cruise control issues in their Land Rover Range Rover.
When the cruise control in your Land Rover Range Rover fails, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and potentially more significant mechanical problems. A malfunctioning control module is often at the heart of the issue, but it could also stem from faulty sensors or switches, particularly those located on the steering wheel. These components can cause the cruise control to operate intermittently, which can be frustrating and dangerous while driving. Additionally, problems with throttle actuation, such as improper cable adjustments, can hinder the system's performance. Electrical issues, including burnt-out fuses like fuse number 16 in the engine bay, can also disrupt the cruise control functionality. By diagnosing these common issues early on, you can not only restore the cruise control system but also ensure a safer driving experience, preventing further complications that could arise from ignoring these symptoms.
Read about related problems experienced by other Land Rover Range Rover drivers like you.
See what others are asking about their Land Rover Range Rover. Get answers from RepairPal's community of auto experts and enthusiasts.