Common Reasons the Check Engine Light Illuminates

When the check engine light turns on, it's not an automatic indication that your engine is nearing total failure. But you'll still want to visit the shop so that any emerging issues can be taken care of before they worsen. At Phil and Son Auto Repair, our local mechanics use advanced computerized diagnostics to ensure accurate identification of the problem. Then we can get right to work on addressing the issue so that you can get your vehicle back ASAP.

Common Check Engine Light Triggers

When the check engine light illuminates, a failing catalytic converter is often to blame. Signs of a faulty catalytic converter include decreasing acceleration, a sulphurous smell, and worsening fuel-efficiency. Your catalytic converter helps to ensure that your vehicle isn't excessively polluting so it's important to take care of issues with it.

There are sensors in your car that can trigger the check engine light when problems with them arise. A faulty oxygen sensor is one potential trigger. With a bad oxygen sensor, you may notice rough idling or engine misfiring. Trouble with a mass airflow sensor can also cause the light to turn on. A faulty mass airflow sensor can cause engine hesitation while accelerating, and may cause your vehicle to stall out.

Bad spark plugs are another potential culprit when the check engine light comes on. Generally, cars made after the year 2000 can go 100,000 miles before they need their plugs replaced, while older cars tend to need new plugs more often. Faulty ignition coils can also cause the light to illuminate. Symptoms of ignition coil trouble include misfiring, as well as weak acceleration.

In some cases, all that's causing the light to illuminate is a loose gas cap. It's important to make sure your gas cap is fastened tightly after every time you fill up. If your cap is loose or missing, then fuel could evaporate, and your check engine light might come on.

Also, a bad battery may trigger the light if it is causing low voltage at the computer.

Check Engine Light Repair in Manchester, NH

When you need check engine light repair in Manchester, NH, contact Phil and Son Auto Repair at (603) 669-6827. At our local auto shop, we can expertly address any of your vehicle's repair or maintenance needs. Feel free to give us a call today to make an appointment!

Phil and Son Auto Repair Blog
Posted: August 30, 2021

Written and Published By MORBiZ