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.
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.
When contemplating the urgency of repairing the non-functioning cruise control on a 1994 Porsche 968, it's essential to weigh both the convenience and potential safety implications. While this feature may seem non-essential for everyday city driving, neglecting the repair could lead to more significant electrical issues within the vehicle, especially if the underlying cause is linked to other systems. For those who frequently embark on long highway journeys, a malfunctioning cruise control can detract from the driving experience and increase fatigue, making timely repairs more critical. Additionally, addressing the problem early can prevent further complications, such as damage to the throttle control or brake systems, which could pose safety risks. Therefore, while it may not be an immediate concern for all drivers, prioritizing the repair of the cruise control system is advisable to ensure both the vehicle's performance and the driver's safety on the road.
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