Reading engine codes is an easy task that any DIY type person can do with the right scan tool.
The scan tool needed is called an OBD2 scan tool which reads information from a vehicles computer and displays the problem.
OBD2 is a universal port installed in any car made from 1996 and newer. The port is usually located under the dashboard and simply needs a code reader to show any problem that a car or truck may have.
Engine scan tools come in all shapes and sizes from stand-alone units to small Bluetooth units that talk to a smartphone.
The prices have fallen drastically from the early days when large computers were needed to decode the signals.
There are many units available with some of our favorite picks below.
As always be sure to read the reviews on Amazon or elsewhere to be sure a unit is a good fit for you.
Easy to Use Engine Code Reader for the Beginner
- Actron CP9125 PocketScan
- LAUNCH Creader 4001
- Autel MS300 Universal
- USB 425801 OBDLink SX
- Elm 327
The Actron CP9125 PocketScan is an easy to use unit that can both read codes and clear them.
It is a standalone unit so it doesn’t require another computer to help decode problems.
Like all readers it displays a code number which can than be looked up in the book it comes with, or looked up online.
The Actron CP9125 is a good unit that any one can use to decode a problem with their engine.
The Launch CReader 4001 is a good easy to use scan tool.
It is low-cost with tons of features making it a good unit for someone new to OBDII scan tool or even a professional.
It includes OBD Partial Functions, Read DTCs, Clear DTCs, Read dynamic data streams, Read vehicle information and much more.
The Autel MaxiScan MS300 is a good unit for those on a budget.
Like other units it displays errors with a code that can than be looked up.
While it doesn’t have many advanced feature it is a good basic unit that can read engine codes.
For those who want more options at a low-cost the ScanTool 425801 OBDLink SX USB is a good unit
It connects an engine OBD2 port to a laptops USB port.
Software is than used to decode the signals and many other options such as clearing the error.
Using a smartphone to read engine codes is a popular option with a Bluetooth OBD2 dongle.
The Elm 327 is one of the more popular options with many more available.
It plugs into a vehicles OBD2 port and transmits to a smartphone via Bluetooth.
Many apps are available both free and paid that decode the signals and display any errors.
Summary
Finding a problem with any car or truck 1996 and newer is not difficult and not something only a mechanic can do.
Anyone can buy a low cost OBD2 scan tool and diagnose a problem.
Once a code is found it is best to look it up online and read forums to see what the steps were taken to solve a problem.
As always be sure to read the reviews on Amazon or elsewhere to be sure a unit is a good fit for you.