What are common check engine light triggers?

What are common check engine light triggers?


When the check engine light comes on, it doesn't always mean that engine failure is nearing. But it's best to play it safe and visit the shop for diagnostics so that the issue can be identified before it gets worse and costs more to fix. At CNC Automotive & Diesel Repair, our local auto shop uses advanced diagnostic equipment to make sure we accurately diagnose the problem that is triggering your check engine light. Whenever a dashboard warning light comes on, you'll want to be proactive about addressing it.

Common Reasons the Check Engine Light Turns On

A malfunctioning catalytic converter is often to blame for an illuminated check engine light. It's important that you're driving with a healthy catalytic converter so that your car isn't excessively polluting. Signs of catalytic converter trouble include worsening acceleration, a sulphurous odor, and a drop in MPGs. A bad oxygen sensor can also trigger the check engine light, and may cause issues with the catalytic converter. Another sensor that can cause the check engine light to come on is the mass airflow sensor. Problems with a MAF sensor may cause your car to stall shortly after you start your engine.

Another potential check engine light trigger is malfunctioning spark plugs. If your car was manufactured in the last twenty years, then there's a good chance it can go 100,000 miles before needing new plugs. Older automobiles tend to need plug replacement more frequently. An ignition coil problem could also trigger the check engine light. Ignition coil trouble can cause problems with getting your car to start, and may also lead to a reduction in fuel-efficiency. A faulty car battery can also trigger the light if it causes low voltage at the computer. A loose gas cap might also cause the light to come on as it allows vapors to escape the tank.

Check Engine Light Repair in Troy, MO

When you need auto repair in Troy, MO, contact CNC Automotive & Diesel Repair at (636) 242-5062. At our nearby auto shop, we provide expert check engine light diagnostics and repair. Feel free to give us a call today to schedule an appointment for any of your vehicle's repair or maintenance needs!


CNC Automotive & Diesel Repair Blog
Posted: July 8, 2021

Written and Published By MORBiZ