Back to all

Watching Your Check Engine Light

May 17, 2022

Did you know that most of the cars driving around Sparta, Illinois, carry more computer power than the Apollo 121 Lunar Module that landed on the moon in 1969?

New cars sold in the Sparta area have as many as 12 networked computers and over five miles (eight kilometers) of wiring. In fact, for the last decade or so, auto computers have been controlling about 85 percent of your vehicle's functions.

Cars have sensors for manifold air temperature, coolant temperature, manifold air pressure, airflow, throttle position, vehicle speed and oxygen content. All of this electronic wizardry is pretty complicated. So how do Sparta drivers know when there is a problem?

It's simple; the Check Engine light comes on. The computer monitors all the sensors and uses that information to decide what to adjust such as the fuel mix, spark timing and idle speed. In addition, the computer monitors its own circuits. When it finds a fault, it turns on the Check Engine light and stores a trouble code in the computer.

It can be pretty disturbing for Sparta drivers when the Check Engine light comes on. We wonder just how urgent it is. Generally speaking, it is not critical like a temperature or oil pressure light. When you get one of those it means STOP NOW! When the Check Engine light shows up, you should come in to Charlie's Fast Lube Sparta in Sparta to find out what the matter is as soon as possible.

Since 1996, there has been a strong emissions control component to the Check Engine diagnostic. But if your Check Engine light flashes on and off, you know that it is more urgent and you need to get it checked immediately to prevent damage. You should slow down and avoid towing or heavy loads until you can get it checked out.

Your friendly and knowledgeable technicians at Charlie's Fast Lube Sparta have special diagnostic equipment that will retrieve the trouble code from the computer and help him determine what is wrong. From there, we can fix it and get you back on the road.

Stop by if you're Check Engine light is on.

Charlie's Fast Lube Sparta
10 Northtown Drive
Sparta, Illinois 62286
618-443-6112
http://www.charliesfastlubesparta.com

Need Service?

Request a Quote

More articles from Charlie's Fast Lube Sparta

Staying In Charge (Alternator Repair)

November 2, 2025

Seems like these days, we're hearing about more and more electric or hybrid vehicles. Keep in mind that conventional gasoline internal combustion vehicles have important electrical components, too, and it's important to make sure they're operating at their peak. In a vehicle with a gasoline engi... More

Mileage Headed Downhill? (What Causes Bad Fuel Economy?)

October 27, 2025

Name someone you know who enjoys spending a lot of money on gasoline. Yeah, me neither. Thats because it costs quite a bit to keep fueling your vehicle. One way to save money on gas is to get good fuel economy, and most of todays vehicles are designed to maximize your mileage. But you might f... More

Oil's Well That Ends Well (Oil Change Grades and Weight)

October 23, 2025

Changing your oil regularly is one of the most important things you can do to keep your vehicle running well. And knowing the right type of oil to use is also very important. Engine oil is classified by weight, but it doesn't refer to how much the oil would weigh if you put it on a scale. It r... More