Back to all

Why Is My Check Engine Light On?

March 31, 2024

The Check Engine Light strikes fear into the hearts of some Plymouth drivers, and is totally ignored by just as many. Just what it means is a mystery to most people.


Let's get the urgency issues out of the way first. If your Check Engine light is flashing, that means that something is wrong that could cause engine damage. Naturally, you need to get that taken care of right away. If your check engine light is flashing, you shouldn't drive at high speeds, tow or haul heavy loads. Take it easy all the way to your Plymouth service center.

drive

If the light is glowing steadily, you should keep an eye on it for a day or two. If the light doesn't go off, schedule an appointment with your friendly and knowledgeable pros at Ryan?s Auto Repair of Plymouth to get it checked out.

Some more information on how the Check Engine light works may be helpful for Plymouth drivers. Most of your engine functions are controlled by a computer, not surprisingly, called an engine control computer. The computer is able to adjust many engine parameters for environmental conditions, engine condition and even the way you drive.

In order to make these adjustments, the computer relies on a network of sensors to provide data. The computer knows the proper operating range for each sensor. When a sensor reading is out of range, the computer runs some tests and may turn on the vehicle's Check Engine light.

A simple example is a loose or missing gas cap. This may cause one of the sensors to read out of range. The computer doesn't know if it's a serious condition that caused the reading or just a loose gas cap, so it stores a trouble code and turns on the Check Engine light.

Now when you tighten up the gas cap, the sensor readings will be in the correct range. The computer will keep checking on the report for a day or two. Since a bad reading didn't come up again, it turns off the Check Engine light. The computer will also try to make adjustments to compensate for some readings. If it can do so, it'll then turn off the Check Engine light.

If the problem can't be resolved then the light will remain on, and you should get your vehicle looked at. Your friendly and knowledgeable pros at Ryan?s Auto Repair of Plymouth will plug a scanner into the on-board diagnostic port and read the trouble code stored in the computer. The trouble code will give the technician a starting place as he diagnoses the cause of the problem.

 

Ryan?s Auto Repair of Plymouth
41990 Joy Rd
Plymouth, MI 48170
734-454-0979
https://www.ryansautorepairplymouth.com/

Need Service?

Request a Quote

More articles from Ryan's Auto Repair of Plymouth

Fuel for Thought

January 12, 2025

If you're like most people and drive a gasoline-powered vehicle, you need to be up to speed on its fuel-related components. They're pretty basic: the fuel, the fuel filter and the fuel pump. The fuel's the easy part. You probably gas up your vehicle yourself and, if you're like most drivers, pr... More

Automotive Tips from Ryan?s Auto Repair of Plymouth: Battery Testing

January 5, 2025

The simple fact is that 70% of car batteries fail within 4 years. They just need to be replaced at Ryan?s Auto Repair of Plymouth when they are no longer able to hold a full charge.Batteries are a big ticket item for most Plymouth drivers and its tempting to put off buying a new one as long as po... More

The Ryan?s Auto Repair of Plymouth Basic Guide To Synthetic Oil

December 29, 2024

Synthetic motor oil has been around for a long time, and more and more new vehicles are leaving factories with synthetic in their engines. But a lot of drivers don't really know much about it.Let's start with conventional oil the kind folks are used to. Conventional oil is made up of naturally o... More