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Car Diagnostic Tests Help Us Determine Why Your Check Engine Light Is On

It’s nerve-rattling when your check engine light comes on. You don’t know whether you should pull your car over and stop driving or if it’s okay to move on. LP & Sons Auto Care can determine why your check engine light is warning you of trouble. We have state-of-the-art vehicle diagnostic equipment that helps us pinpoint the problem quickly. Let’s talk about this further and why the dashboard warning light is on.

Reasons for the Check Engine Warning

The check engine light warns you of problems with vehicle systems that do not have their own warning light. It covers issues with the electrical system as well as the exhaust, fuel, and ignition systems. It will also turn on if there is a problem with your automobile’s transmission. The most common reasons why a check engine light comes on include trouble with the catalytic converter, electrical voltage, fuel cap, mass airflow sensor, onboard computer and/or sensors, oxygen sensor, and spark plugs.

Vehicle Diagnostic Testing

As we mentioned above, the common engine parts that trigger a check engine light do not have their own warning light; the light acts as a catch-all. Because of this, it can be hard for auto mechanics to determine why the light came on if they only visually inspect your automobile and there are no other warning signs present. In this case, a vehicle diagnostic test tells mechanics why, exactly, the check engine light came on, so they know immediately what to do to fix the problem.

Your automobile, whether it’s a car, crossover, SUV, truck, or van, has an onboard computer (in the form of a main chip) and sensors on all vehicle systems. When you first turn on your vehicle, all of your dashboard lights illuminate because the sensors are checking each system and reporting back to the main computer. The main computer turns off each light once it gets the “all systems go” from the sensors. If there is a problem, the main computer will leave a light on and record an error code.

When we plug your vehicle into the diagnostic testing machine, it tests each computer system and prints results. It includes in those results any error codes previously reported to the main computer chip. We use these error codes to identify any problems, i.e. why your light came on. So, for example, if your oxygen sensor is failing, we can tell that by the error code returned on the engine diagnostic report. This significantly reduces the time it takes for us to diagnose your car trouble.

Call LP & Sons Auto Care in DeLand, FL, if your check engine light comes on.

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