6 Common Check Engine Light Triggers

An illuminated check engine light doesn't necessarily mean that your engine is on the verge of catastrophe. Nonetheless, you'll want to get to the shop ASAP so that any developing problems can be addressed before they escalate and then cost more to fix. At Phil and Son Auto Repair, our local mechanics are experts at check engine light diagnostics and repair in the greater Manchester, NH area. Here's a look at six common reasons the check engine light comes on.

Failing Catalytic Convertor

The catalytic converter turns dangerous compounds in the engine's emissions into safer gasses before they are released into the air. Symptoms of catalytic converter trouble include darkened exhaust smoke, as well as a sulfurous stench.

Faulty Spark Plugs

Signs of failing spark plugs include misiring, worsening acceleration, decreasing gas mileage, and trouble with getting the engine to fire up. Healthy spark plugs are necessary for attaining peak performance and fuel-efficiency.

Failing Mass Airflow Sensor

Indications of a failing mass airflow sensor include rough idling, decreasing acceleration, and hard starts. It's important that mass airflow sensors are healthy so that fuel is correctly injected with incoming air.

Bad Oxygen Sensor

Oxygen sensors do the important job of monitoring how much unburned oxygen is in the exhaust system. Problems with oxygen sensors may lead to catalytic converter trouble.

Faulty Battery/Charging System

With a faulty battery, there may be low voltage at the computer. This can then trigger the check engine light.

Gas Cap is Loose/Missing

It's important to make sure you return your gas cap to a tightly secured position after every time you fill up. A loose or missing gas cap may allow fuel to evaporate before your engine gets the chance to put it to use.

Check Engine Light Repair in Manchester, NH

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

Phil and Son Auto Repair Blog
Posted: September 2022

Written and Published By MORBiZ