What problems trigger the check engine light?

What problems trigger the check engine light?


What problems trigger the check engine light?When your check engine light turns on, it doesn't automatically mean that disaster is near. However, it's always best to promptly get your vehicle to the shop for computerized diagnostics so that any emerging issues can be addressed before they require more expensive repairs. Here's a look at seven reasons the check engine light comes on.

Faulty Catalytic Converter

To ensure that carbon monoxide is turned into a less polluting emission, you need to be driving with a healthy catalytic converter. Indications of catalytic converter trouble include decreased acceleration and dark exhaust smoke.

Bad Oxygen Sensor

Healthy oxygen sensors ensure the proper monitoring of unburned oxygen in the exhaust system. If your oxygen sensor is faulty, it could lead to a drop in gas mileage, as well as catalytic converter trouble.

Failing Mass Air Flow Sensor

Mass air flow sensors keep tabs on the quantity of incoming air and calculate how much fuel should be injected with it. One sign of mass air flow sensor trouble is that your engine stalls shortly after you start it.

Faulty Spark Plugs

Bad spark plugs can lead to diminished performance and fuel-efficiency. As a general guideline, spark plugs in older vehicles should be replaced every 30,000 miles. For vehicles manufactured after 2000, you can often wait 100,000 miles before you need to replace plugs.

Loose/Missing Gas Cap

As strange as it may seem, a loose gas cap can potentially cause your check engine light to illuminate. It's best to always drive with a tight gas cap so that fuel doesn't evaporate before you get the opportunity to use it.

Failing Ignition Coil

Healthy ignition coils play a central role in generating the spark necessary to fire up your engine. Symptoms of ignition coil trouble include misfiring and power loss.

Bad Battery/Charging System

A failing battery can cause low voltage at the computer, which can consequently trigger the check engine light.

If you need auto repair, be sure to bring your vehicle to a reputable shop. For check engine light diagnostics & repair in San Diego, contact the experts at Japanese Carmasters at (858) 282-0918. Feel free to give Japanese Carmasters a call today to schedule an appointment for any of your foreign or domestic vehicle repair needs!


Japanese Carmasters Blog
Posted: October 10, 2020

Written and Published By MORBiZ