Today’s vehicles come fully loaded with sensors that monitor every system that makes a car run. From the ignition to valve timing, from exhaust gases to fuel injection and everything in between, there’s a sensor keeping tabs on what’s going on. The data collected by these sensors is sent to computers known as electronic control units (ECU), which use the information to alter, improve and control the various systems to keep the vehicle performing at its best.
If the sensors detect a fault which the computers can’t correct, the vehicle’s on-board diagnostic system (OBD) creates and stores a ‘trouble code’ and the driver is notified that there is an issue via a warning light on the dashboard. There are a multitude of these warning lights, covering issues such as engine temperature, battery/alternator performance, low fuel, oil pressure and so on, but the one that can make any car owner feel a little more on edge than usual is the Check Engine Light (CEL).
The CEL can cover a multitude of potential problems, from the minor to the extremely serious. If the CEL comes on, then a trip to the mechanic is a must.
Fortunately, the diagnostic trouble code stored by the vehicle’s computers allows a mechanic to have a good idea where the problem lies. Using a special diagnostic tool, a technician can plug into the vehicle, access the stored data, and relatively quickly find and diagnose the fault.
WHAT SHOULD YOU DO?
The Check Engine Light is there for a reason. Don’t ignore it! It’s important any problem be addressed quickly. While the vehicle might feel like it is behaving and driving properly, the CEL only lights up when there is something wrong. Engage the services of a qualified mechanic and get the problem addressed and fixed as soon as possible. It will save you the anxiety of wondering exactly what is wrong and avoid costlier repairs down the track.
WANT TO LEARN MORE?
MTA Queensland’s Vehicle Maintenance course is designed for those who are interested in gaining valuable information and learning good practices for everyday vehicle use. The result: a safer journey with fewer breakdowns and repairs. If you have ever wanted to learn how to carry out preventative maintenance, then this course is for you.
15 April 2020
Please note the information contained on this page is general in nature and does not take into account your specific needs or circumstances. You should consider whether the information is appropriate to your needs, and where appropriate, seek professional advice.