why is my check engine light on but car drives fine

It normally takes the form of an engine block or check engine wording and appears on the dashboard behind your steering wheel. The check engine light will also turn on if your car is experiencing poor fuel economy.

Why Is My Check Engine Light On Autozone

Possible causes of the check engine light to come on are.

. Ignition coils are responsible for converting the batterys voltage into a higher voltage to get the electrical system starting. Modern cars have computerized transmissions which are often integrated with engine control computers for efficiency. Most common cause of engine lights is either an air fault such as air flow meter or air mass sensor.

Normally the appearance of a check engine light indicates a problem somewhere in your vehicle but nothing seems amiss. If nothing seems to be acting strange then it is probably safe to drive it until you can get it into a mechanic. Your Fuel Cap Is Loose or Faulty.

When the check engine light appears and stays on the warning can signal a serious problem with your cars engine. Faulty spark plugs can also lead to shaking or vibrating your car and check engine light flashing when. It can also be due to issues with the ignition like bad spark plugs or ignition coils.

If a spark plug fails to spark consistently a check engine light could result. Glowing check engine light does not usually indicate an emergency but one should never ignore it for a longer time. Some vehicles deliver an electrical spark from the ignition coil to the spark plug via plug wires.

A loose fuel cap is one of the most common reasons why the check engine light turns on. Spark PlugsPlug Wires are Faulty. Why its a problem.

Generally a flashing CEL indicates that the engine is misfiring which can damage your engine or catalytic converter. A slightly less common cause of a check engine light is a problem with the transmission. The gas pump has a pressure sensor in it to tell it when it is full.

There are others but if the car is driving fine then most likely an air fault. A loose fuel cap is one of the most common reasons why the check engine light turns on. Depending on how much you drive with your gas light on.

But the warning light can also come on due to minor issues such as a loose wire or gas cap not being fully closed. The EML is generally triggered when your cars sensors detect a potential issue with the engine. Check the air sensor sometimes they just need a clean up rather than replacement.

The most common cause of a check engine light is an issue with the emission control system like a bad oxygen sensor or MAF sensor. A faulty air filter will result in lower gas mileage more emissions and stalling in some cases. If the light comes back on and your gas needle keeps dropping then im sure that you have a sensor problem.

Do a brake and steering check. Your tank should fill up to 10-12 gal. With a faulty ignition coil you might notice an engine misfire and your vehicle will right roughly.

The air intake of the engine is highly technical. What Could Cause The Check Engine Light To Come On. The cap is a crucial part of a cars fuel delivery system.

Any electronic sensor or component on your vehicle that detects engine performance anomalies can cause the Check Engine Light to activate and a lack of communication with the sensor may also result in a trouble code. For filling the tank until it clicks your fine. Generally your cars spark can plugs last up to 100000 miles.

Mass Airflow SensorMAF needs replacement. This is related to the condition of the MAF sensor the oxygen sensor catalytic converter and spark plugs. There are several reasons why a cars check engine light turns on.

If you fail to replace your vehicles air filter the check engine light can turn on. Oxygen sensor or O2 sensor The oxygen sensor monitors and measures how much fuel the car burns. Sometimes a car doesnt have a separate light for the transmission.

When a fuel cap doesnt seal properly vapors leak out and air gets in throwing the fuel system out of whack. Basically the check engine light. A flashing Check Engine Light means that you need to pull over immediately as your vehicle has a serious issue that could cause severe engine damage if its left untreated.

Here are some of the more common engine issues and what your check engine light might be trying to tell you. The whole purpose of the check engine light is to illuminate whenever there is a problem. Spark plugs are easily replaceable and should be switched out with fresh ones about every 30000 to 60000 miles.

During a regular maintenance check we can look at your mass airflow sensor and service your vehicle if needed. A dashboard warning light can often be one of the first signs of a problem with your vehicle. Sometimes the light may come on after fueling if the gas cap is a little loose.

Most vehicles have between two and four oxygen sensors and if any of. Heres a list of some of the most common check engine warnings. Untightened gas cap is the most common reason the check engine light is triggered.

Takes like 5mins-15 mins to reset. About ignition coil can cause the check engine light to. Your car is still running at its best and there seems to be absolutely nothing wrong.

Bad or Faulty Catalytic Converter.

Five Reasons Why Your Vehicle S Check Engine Light Is On