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 a Pontiac Bonneville, it's essential to adopt a systematic diagnostic approach that begins with the simplest potential problems before moving on to more complex ones. Start by inspecting the cruise control button for any signs of damage or dirt, as a malfunctioning button can prevent the system from engaging. Next, check the brake switch and cruise control servo, as these components are often responsible for cruise control failures. If the system remains unresponsive, investigate the power supply and wiring for any electrical faults that could be interrupting functionality. Additionally, consider the control module and throttle actuation, particularly if your vehicle has a specific engine type known for intermittent issues. By methodically assessing these areas, you can effectively identify and resolve the underlying causes of cruise control malfunctions in your Pontiac Bonneville, ensuring a smoother driving experience.
When dealing with cruise control malfunctions in a Pontiac Bonneville, it's crucial to consider several common problems that may be affecting the system. Start by inspecting the control module, as failures here can prevent the cruise control from engaging properly. Additionally, check the sensors and switches, as these components are vital for the system's functionality. Throttle actuation issues can also disrupt cruise control, so ensure that the throttle control system is functioning correctly. Don't overlook the possibility of a blown fuse or a defective brake pedal switch, both of which can interrupt the cruise control operation. In older models, a broken vacuum line may be the source of the problem, so it's worth examining this as well. By systematically checking these components, you can effectively diagnose and resolve the cruise control issues in your Pontiac Bonneville, making it a manageable DIY project.
When the cruise control in your Pontiac Bonneville fails to operate, it’s crucial to address the issue promptly. Ignoring symptoms such as unresponsive controls or erratic behavior can not only compromise your driving experience but also pose significant safety risks. For instance, a malfunctioning cruise control system may inadvertently engage or disengage, leading to unexpected acceleration or deceleration, which can be dangerous in traffic. Additionally, underlying problems such as a blown fuse, faulty brake light, or issues with the throttle control system can escalate if left unchecked, potentially resulting in costly repairs. Therefore, conducting a thorough inspection of the cruise control system, including checking fuses and sensors, is essential. If basic troubleshooting does not resolve the issue, seeking professional assistance may be necessary to ensure your vehicle remains safe and reliable on the road.
Read about related problems experienced by other Pontiac Bonneville drivers like you.
See what others are asking about their Pontiac Bonneville. Get answers from RepairPal's community of auto experts and enthusiasts.
