Is the Check Engine Light Accurate?

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Yes, the check engine light is extremely accurate. In fact, a recent study proved that there is a problem with the engine seen or unseen when the check engine light turns on nearly every time. That’s why it’s so important that you take a check engine warning seriously. If your check engine light turns on, bring your vehicle to Padron Automotive right away for a diagnostic test. Here are common reasons why the check engine light will turn on and refuse to turn off.

Catalytic Converter Problems

The catalytic converter processes harmful emissions so they can be released safely out of the tailpipe. The catalytic converter can get clogged or malfunction. When this happens, your check engine light will turn on. Your engine might also overheat and you may smell rotten eggs.

Dirty Mass Airflow Sensor

The mass airflow sensor can get dirty because it is located behind the air filter. It usually malfunctions when it is caked with dirt. Aside from the check engine warning, you may also start to have engine performance problems, such as stuttering and misfiring.

Faulty EVAP Control System

The EVAP control system helps control your vehicle’s emissions. It helps prevent gasoline or diesel fuel from evaporating into the environment from your automobile. This includes the cap that seals off the gas tank. Your check engine light will turn on if there is a problem with the EVAP control system.

Malfunctioning Engine Control Unit

The engine control unit can malfunction. Even though it is a computer chip, you can’t reset it yourself like you can reboot your computer. If it goes bad, you will receive a check engine warning and your engine may die.

Malfunctioning Oxygen Sensor

The oxygen sensor measures the oxygen being released in your vehicle’s exhaust. When it malfunctions, your check engine light turns on. You may also experience the engine performance problems discussed above and a noticeable difference in your vehicle’s fuel economy.

Malfunctioning Transmission

You would think that the transmission would have a dashboard warning light of its own but it doesn’t. Therefore, if the engine control unit is notified of transmission problems, it will turn on the check engine light.

Worn Spark Plugs and/or Wires

Finally, another thing that can cause your engine to sputter and misfire is worn spark plugs or plug wires. Because the engine is misfiring, you will also get a check engine warning.

Padron Automotive in Topeka, KS, is here to help, so call us today if your check engine light is on. We will find the reason and fix it.

Photo by HenrikNorway from Getty Images via Canva Pro