OBD stands for On-Board Diagnostics. OBD-II (OBD two) is the latest industry standard, which was introduced on 1995 vehicle models. It provides monitoring of nearly all engine controls, and also some other parts of the vehicle (chassis, body, etc.). Your vehicle can have as many as 8 computers in it, however most only contain 1 or 2.
The most useful part of OBD to most drivers is the ability to read information from the vehicle. You can read trouble codes, and even monitor real-time statistics such as RPM, vehicle speed, etc. There are a variety of different devices on the market ranging from basic code scanners to advanced displays that calculate MPG as you drive.
95-99 Codes
Don't worry if you don't happen to have a scanner. Your neon will still tell you what your DTC is. There are two ways to do this. First is for the 1995 - 1999 year neon also known as the first gen (Gen 1). For this you will need to cycle the ignition key on-off-on-off-on within five seconds, What ever you do don't crank or start the engine, you only need to get dash lights to respond. Now you need to pay attention to the check engine light. Count the number of times the check engine lamp flashes, pause, and flashes again. First set of flashes is first digit, second digit comes after the pause. Some times you will have more then one of these two digit codes, so write them down, afterwords go to this page.
95-99 neon Codes
00-05 and SRT-4 Codes
For the owners of the 2000 to 2005 and the SRT-4, the process is almost the same. Just your neon has a digital odometer and it will show you the code there. You can view the codes by turning the key to accessory and back without starting the car, three (3) times, On the Fourth (4) cycle leave it on the Accessory position. It should start displaying the codes where your mileage is usually displayed.
The following links will point you in the right directions to help correct what issues you might have.
