How to diagnose the check engine light on your car with your smartphone

By TechThop Team

Posted on: 17 Aug, 2022

As far as car problems are concerned, Lemur Vehicle Monitors does not promise to end them, but its BlueDriver Pro diagnostic dongle will certainly make it easier for you to figure them out.

There is power in information, however, and it can mean the difference between your car being off the road for days while you wait for repairs or being able to fix it yourself and get back on the road very quickly.

A modern car will usually let you know when there is something wrong with it by turning on the dreaded check engine light as a warning to let you know there is something wrong.

The good news is that you can now find out what the problem is even before you visit the mechanic. It is possible to connect your smartphone to your car and have it tell you what it is doing with the right tools.

With this Bluetooth dongle by Lemur Vehicle Monitors, you can read trouble codes and view live data about your car's engine, transmission, and other systems via the car's On-Board Diagnostics port.

The BlueDriver dongle is inexpensive, you download the app for iOS or Android, pair it with your smartphone, plug it into your car's OBD port, and start reading data. The first challenge most people encounter is finding their car's OBD port. 

The BlueDriver is connected to a 2021 Kia Stonic here if you are not able to locate it. If you can't find it, consult your owner's manual or Google for the answer. In this review, I will use this car as an example even though it doesn't have any problems.

The BlueDriver software can show you the trouble code if the check engine light is illuminated, and beyond that, it can provide information about when the car gave that warning, called Freeze Frame data, which is important information for diagnosing a problem.

The BlueDriver Pro has the benefit of free updates, and you don't have to pay a subscription to access your car's data. Alternatively, you can get repair reports detailing possible fixes for trouble codes, although this feature does not seem to be available in the UK.

The BlueDriver dongle can also provide information on how to reset the oil light on your dashboard, the Tire Pressure Monitoring System, or the battery light. Oh, and don't forget to unplug your BlueDriver once you are done using it.

The Lemur BlueDriver is a popular scan tool I use often, among the many scan tools I have access to for cars. Keeping it in the glovebox means I'm prepared to diagnose any problems I encounter in my car or for my friends and family.

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