Check Engine Light And No Cruise Control
Driving your car can be a pleasant and comfortable experience, especially when you've got a working cruise control that allows you to maintain a constant speed on the highway without having to constantly tap the gas pedal. However, when the check engine light (CEL) comes on and you lose your cruise control, it can be quite frustrating and even dangerous. In this article, we'll explore the most common reasons why the CEL and cruise control might stop working and what you can do about it.
What Is The Check Engine Light?
The CEL is a warning light that appears on your dashboard when there's a problem with your car's engine or emission control system. It can indicate a wide variety of issues, from a loose gas cap to a malfunctioning oxygen sensor, but in all cases, it's a sign that your car needs attention. The CEL is often shaped like an engine, but it can also be a simple warning light with the words "Check Engine" or "Service Engine Soon".
What Is Cruise Control?
Cruise control is a feature in modern cars that allows you to maintain a constant speed without having to press the accelerator pedal. It's a great feature for long drives on the highway, as it helps reduce driver fatigue and save fuel. Cruise control works by using sensors to detect the speed of your car, then adjusting the throttle or brakes to maintain your desired speed. Most cars have a dedicated button or lever that turns the cruise control on and off, as well as buttons or knobs that allow you to set the desired speed and adjust it up or down.
Why Would The Check Engine Light And Cruise Control Stop Working?
There are many reasons why the CEL and cruise control might stop working simultaneously. Here are some of the most common:
- Faulty speed sensors: The speed sensors are responsible for detecting the speed of your car and transmitting this information to the car's computer. If one or more speed sensors fail, the computer may not be able to maintain the cruise control or provide accurate speed readings, triggering the CEL.
- Loose gas cap: A loose or missing gas cap can cause the CEL to come on, as it can allow air to enter the fuel system and disrupt the emission control system.
- Faulty throttle body: The throttle body is responsible for regulating the amount of air that enters the engine. If it malfunctions, the cruise control may not work properly, and the CEL may come on.
- Malfunctioning brake switch: The brake switch is responsible for deactivating the cruise control when you press the brake pedal. If it fails, the cruise control may not disengage properly, causing the CEL to come on.
- Malfunctioning EGR valve: The EGR (Exhaust Gas Recirculation) valve controls the amount of exhaust gas that's recirculated back into the engine. If it fails, the car may not run smoothly, and the CEL may come on.
What Should You Do When The Check Engine Light And Cruise Control Stop Working?
If your car triggers the CEL and disables your cruise control, the first thing you should do is check the owner's manual for any advice or warnings. You can also take your car to a mechanic or an auto parts store that offers free diagnostic testing, as they can use a scanning tool to read the code that triggered the CEL and give you an idea of what might be wrong.
Some of the most common solutions for CEL and cruise control problems include:
- Tighten or replace the gas cap: If the CEL was triggered by a loose gas cap, tightening it can often solve the problem.
- Replace faulty parts: If the problem is caused by a faulty speed sensor, throttle body, brake switch, or EGR valve, you may need to replace the affected part to restore normal operation.
- Clean the throttle body: If the throttle body is dirty or clogged, cleaning it with a throttle body cleaner may help restore proper functioning.
- Repair or replace the cruise control module: If the cruise control system itself is malfunctioning, you may need to replace the cruise control module or have it repaired by a mechanic.
In Conclusion
The CEL and cruise control are two important features in modern cars that can make driving more comfortable and efficient. When they stop working, it's important to take action and diagnose the underlying problem to prevent further damage or safety risks. By understanding the most common causes of CEL and cruise control malfunctions and the possible solutions, you can take care of your car and enjoy a worry-free driving experience.