Nothing can be more unsettling when driving than seeing the Check Engine light flashing on your dashboard. This warning light isn’t just for show; it’s your vehicle signaling that something needs attention under the hood.
In this guide, you’ll learn about what can cause the Check Engine light to come on, its importance, and actionable steps you can take before scheduling a repair service.
What is a Check Engine Light?
The Check Engine light, also known as the Malfunction Indicator Light (MIL), is an integral part of your vehicle’s on-board diagnostics system (OBD). This universal icon across car makes and models is an early warning system designed to alert drivers about potential vehicle engine or emission control system issues.
When activated, it signals that the vehicle’s computer system has detected abnormalities or malfunctions that require immediate attention, prompting drivers to address the underlying problems. The system also saves a diagnostic trouble code (DTC) identifying the issue. A skilled mechanic uses a scan tool to read this code and diagnose and fix the problem.
Common Reasons for the Check Engine Light to Come On
Understanding the standard triggers for the Check Engine light can help you resolve vehicle issues quickly. Some of the most common causes are:
- Loose or faulty gas cap. If your gas cap is loose or faulty, it allows fuel vapors to escape.
- Catalytic converter problems. This crucial emissions control device can develop faults, causing your Check Engine light to switch on.
- Oxygen sensor issues. Responsible for measuring the amount of oxygen in the exhaust gasses, a malfunctioning oxygen sensor may provide inaccurate readings to the car’s computer.
- Ignition system problems. Issues with components like spark plugs, wires, or coils can cause misfires.
- Damaged mass airflow sensor. This sensor monitors the amount of air entering the engine, and when damaged, it confuses the car’s computer.
- Faulty EGR valve. The Exhaust Gas Recirculation (EGR) valve, responsible for recirculating exhaust gas into the engine, can cause the Check Engine light to come on if it malfunctions.
- EVAP emissions system leaks. Small leaks in the Evaporative Emissions (EVAP) system, designed to capture and recirculate fuel vapors, can activate the Check Engine light, signaling a need for inspection and repair.
Importance of the Check Engine Light
The Check Engine light serves as an essential safeguard, warning you of potential engine problems that might not be apparent through sight or sound while driving. It not only indicates possible engine failure or high gas emissions but also acts as a preventive tool to avert damage to components such as the catalytic converter.
By promptly identifying minor issues, the Check Engine light preserves the integrity of the vehicle’s emissions system, preventing more significant, costly problems.
What To Do When Your Check Engine Light Comes On?
If your Check Engine light switches on while driving, follow these steps to address the situation:
Don’t Ignore the Warning
The Check Engine light is your car’s way of signaling something is wrong. Whether it’s a minor glitch or a bigger issue, ignoring it can worsen matters, possibly leading to more expensive fixes.
Assess the Situation
When the light appears, conduct an initial assessment by observing any changes to your vehicle’s performance metrics, such as miles per gallon or reduced horsepower. Pay attention to how the engine sounds, how much fuel you’re using, and how the accelerator responds. This preliminary assessment provides important data for your mechanic.
Check Your Dashboard for Other Warning Lights
Scan your dashboard for other warning lights. If you see additional warnings like low oil pressure or high temperature, it might mean you need to pull over and address the issue immediately.
Listen for Unusual Noises
Listen closely to your car’s sounds. If you hear odd noises like knocking, hissing, or backfiring, these could be signs of specific problems, like a worn serpentine belt, vacuum leak, or loose exhaust system parts. Be alert to any strange sounds from the transmission or wheels, as these can also trigger the Check Engine light.
Reduce Your Speed
Slow down if the Check Engine light flashes or the car isn’t running right. Lower your speed gradually to ease any strain on the engine and related parts. You might also want to shift to a lower gear if possible, which can help reduce stress on the engine until you can get it looked at.
Use an OBD2 Scanner
Use an On-Board Diagnostics II (OBD2) scanner for a detailed analysis. Connect the scanner to the OBD2 port, usually located beneath the dashboard, to retrieve Diagnostic Trouble Codes. Document all retrieved codes as they provide specific insights into malfunctioning components or system irregularities.
Seek Professional Help
While diagnostic tools offer valuable data, consulting with automotive professionals is the best option for accurate diagnosis and repair. Schedule a consultation with certified technicians with advanced diagnostic equipment and expertise.
Share the codes and describe the symptoms you’ve observed. The technicians can then thoroughly examine the issue and execute needed repairs.
How to Prevent Engine Issues?
Follow these preventive tips to minimize the risk of encountering Check Engine light issues:
- Routine maintenance. Make it a habit to schedule regular inspections, oil changes, and filter replacements. This routine upkeep helps identify potential issues early and keeps your engine in top shape.
- Timely attention to minor issues. Addressing symptoms immediately can save you from larger, more expensive repairs or replacements later.
- Drive responsibly. Develop responsible driving habits by avoiding aggressive maneuvers, rapid accelerations, and prolonged idling periods. These habits can strain your engine and lead to premature wear.
- Choose premium gasoline. Invest in premium gasoline options—superior fuel quality limits deposits from forming on engine components, reducing the likelihood of computer-detected discrepancies.
- Replace air filters regularly. Ensure consistent airflow to your engine by changing air filters at the recommended intervals, usually around 12,000 to 15,000 miles. This step helps prevent potential triggers for the Check Engine light.
- Inspect oxygen sensors. Regularly check your oxygen sensors and replace faulty ones to prevent emissions-related problems.
- Fix leaks promptly. If you notice any leaks in hoses, seals, or gaskets, address them immediately. Taking care of these minor issues can prevent incorrect sensor readings and emission irregularities.
Servicing Your Vehicle with HT Saves
Facing an unexpected Check Engine light? At Hometown Chrysler Dodge Jeep Ram, we are your reliable automotive partner and understand the urgency of addressing this situation promptly to prevent potential complications.
Our MOPAR® Parts and Services Department is geared up to provide fast and effective solutions for your Check Engine light concerns.
- Professional diagnosis. Trust our factory-trained mechanics to thoroughly diagnose the issue triggering your Check Engine light.
- Efficient issue resolution. With access to genuine OEM parts, we ensure efficient and reliable solutions to get your vehicle back on the road.
- Comprehensive inspections. From minor adjustments to major repairs, our team conducts comprehensive inspections to identify and address all potential problems.
- Competitive pricing. We prioritize your satisfaction and offer competitive pricing on all our services, providing exceptional value for your investment.
- Convenient scheduling. Easily schedule your service with us. We serve Albion, Jackson, Marshall, and the surrounding Michigan areas, ensuring convenience for your busy lifestyle.
Trust Hometown for Check Engine Light Solutions
Your vehicle’s Check Engine light is a critical indicator of potential issues. Don’t wait for minor problems to become major headaches. Contact us today at Hometown Chrysler Dodge Jeep Ram to learn more about what can cause the Check Engine light to come on and schedule a repair service today.
FAQs:
Should I Stop Driving Immediately When My Check Engine Light Comes On?
If it’s flashing, pull over quickly. If steady, you can generally drive normally to a service center. Reduce your speed and vehicle load if you notice any dangerous indicators of engine trouble, like smoke emitting from the hood alongside the Check Engine light.
How Long Can I Drive with My Check Engine Light On?
It’s best to have it checked ASAP. But if needed, you can likely drive for several hundred miles with a steady light before risking engine damage. Just be aware of any performance changes or unusual noises.
Does Check Engine Light Reset Itself?
It won’t turn off until the problem is fixed. Sometimes, disconnecting the battery might temporarily reset the light, but it will turn back on if the issue persists. Addressing the cause is essential for a lasting solution.
How Much Does It Cost to Fix a Check Engine Light Issue?
Depending on the issue, repair costs for a Check Engine light can vary from $25 for a loose gas cap up to $1,300 for catalytic converter replacement. Diagnostic fees also apply. Expect $90-$200+ to identify the issue.
