Mar 8, 2024
What to Do After the Check Engine Light Comes on

Your Cadillac has an array of warning lights on the dash. All these lights illuminate when your engine starts and then go dark again. This is part of your computer’s check that all the systems in your car are working correctly. If a light remains illuminated, this means that something is wrong. As your Cadillac dealer, we want to tell you about the check engine light and some of the problems that can cause it to come on.

From Your Cadillac Dealer: What Does the Check Engine Light Do?

What Does the Light Mean?

The engine light is different from the other warning lights on your dash as it doesn’t warn of a problem with an individual system. It lights up in response to any problem that affects your engine. Your Cadillac’s computer has a huge number of sensors that connect to it, and each sensor is connected to an important component.

The sensors continually supply information to your computer on the health and functioning of the component they’re attached to. Your computer uses this information to make all the decisions that allow your Cadillac’s systems to work efficiently and effectively. If a sensor detects a problem, it immediately informs your computer. The computer logs the error and illuminates the engine light as a warning that something is wrong.

How To Identify the Problem

As we’ve seen, the engine light provides a general warning there’s a problem. If this light illuminates, visit our service department ASAP and our Cadillac-trained technicians will investigate the problem. We do this by connecting your Cadillac’s computer to our engine diagnostic system. The diagnostic system will list any error codes generated by the computer.

Some error codes are generic and apply to all vehicles, but many codes are specific to Cadillacs. This makes it important to have an illuminated engine light checked at your dealer. This saves time and money, as a regular mechanic’s diagnostic system can incorrectly identify the error and result in unnecessary and incorrect repairs.

What Happens Next

Once our technicians have the error codes, they will zone in on the identified system or systems. Engine light warnings can identify any problem, from a lean-fuel engine mixture to a blocked catalytic converter. The engine light also signals a warning of a problem in your transmission. This might seem strange, but it’s important to remember that the engine and transmission work together to move your car.

As your dealer, we have expert technicians and advanced technology to quickly and easily repair any problem that’s revealed. As with any problem, the sooner we identify and fix it, the greater the chance that further damage can be prevented.

If you have an illuminated engine light, contact us right away at Service Cadillac.