What are common reasons the check engine light illuminates?

What are common reasons the check engine light illuminates?


What are common reasons the check engine light illuminates?When the check engine light turns on, it doesn't necessarily mean that you're on the verge of catastrophic engine failure. Still, it's smart to soon get to the shop for computerized diagnostics so that any developing issues can hopefully be nipped in the bud. Here's a look at seven common check engine light triggers.

Failing Mass Air Flow Sensor

Mass air flow sensors keep tabs on how much air is coming in, and determine the amount of fuel that should be injected with it. When there's an issue with a mass air flow sensor, the engine might stall shortly after you fire it up.

Faulty Catalytic Converter

To successfully turn carbon monoxide into an emission that isn't as harmful to the environment, you need a healthy catalytic converter. Catalytic converter trouble could be brewing if you notice poor acceleration or dark exhaust smoke.

Bad Oxygen Sensor

Oxygen sensors monitor the quantity of unburned oxygen that is present in the exhaust system. An oxygen sensor issue may lead to a catalytic converter problem. It could also cause a reduction in gas mileage.

Faulty Spark Plugs

Failing spark plugs can harm performance and fuel-efficiency. The general suggestion is that plugs in older vehicles get changed out every 30,000 miles. For vehicles manufactured after 2000, it's often fine to go 100,000 miles before replacing plugs.

Loose/Missing Gas Cap

While it may seem bizarre, a poorly fitting gas cap can potentially cause the check engine light to come on. It could also lead to fuel evaporating before you get the opportunity to use it.

Bad Battery/Charging System

When a faulty battery causes low voltage at the computer, the check engine light may consequently illuminate.

Failing Ignition Coil

Healthy ignition coils play an important role in generating the spark needed for your engine to come roaring to life. Misfiring and power loss are signs of an ignition coil issue.

If you need engine repair, be sure to bring your vehicle to a reputable mechanic. For check engine light diagnostics & repair in Sandy Springs, Dunwoody, Brookhaven, Vinings, and North Atlanta, GA, contact the experts at McCullough Napa Auto Care at (404) 252-3014. Feel free to give McCullough Napa Auto Care a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!


McCullough Napa Auto Care Blog
Posted: November 8, 2020

Written and Published By MORBiZ