Why is the Check Engine Light on?

Why is the Check Engine Light on?When the check engine light illuminates too many drivers ignore it, either because they can't tell there is a problem with how their car is performing or because they fear what it may mean. However, by putting off diagnostics and repairs the issue will only get worse, meaning the repair costs will grow right along with it. If your car's check engine light has come on do not hesitate to get it checked out. The following are a few of the most common reasons that little orange glow will turn on.

Loose Gas Cap

If you fail to tighten the fuel cap after filling up, or if the cap is cracked or otherwise broken, it could allow fuel vapors to evaporate out of the filler hose, meaning you're wasting gas the engine didn't even get a chance to burn.

Misfiring Engine

Misfiring can occur for a variety of reasons, but it is important to resolve this issue quick, as it will drastically reduce your fuel efficiency and engine power. Common reasons for misfiring includes worn spark plugs or bad ignition coils.

Mass Air Flow Sensor

The mass air flow sensor is located near the front of the vehicle. It measures incoming air and calculates how much needs to be mixed with the fuel to ensure a proper running vehicle. If this sensor malfunctions the light will come on because it will generally result in a vehicle that runs rich.

Oxygen Sensor

On the other end of the vehicle is the oxygen sensor. It works similar to the MAF sensor but it monitors oxygen in the exhaust fumes. This too will calculate how much air needs to be mixed with the gas.

Failed Catalytic Converter

If it is found that the catalytic converter has gone bad it is likely that the check engine light has been on for some time. Replacing the catalytic converter, which turns harmful exhaust into less hazardous emissions, is one of the most expensive types of repair for a car. It generally will not fail unless some sort of other problem occurred first, such as any of the above issues, which would have triggered the check engine light first.

Don't ignore the check engine light! If you need check engine light repair in Boise or the surrounding area be sure to visit Mr. Mobile Lube in Garden City. We service all makes and models, including heavy duty trucks, at our full service auto repair shop. To learn more or to request professional auto repair in Boise give us a call at (208) 228-0054 today!

Mr. Mobile Lube Blog

Written and Published By MORBiZ