The OBD2 code reader is a hand held device that has very few buttons and a small screen. It goes into the OBD 2 slot in your car to communicate with the car’s computer to know what is wrong with your car. OBD actually stands for On Board Diagnostics. It checks the functionalities of your car engine. The latests and ongoing standard for checking your engine, chassis and select other functions is the set standard called OBD 2. The reason why this device is very important to use for many car owners is because it can connect with your car and read the information regarding troubleshooting and trouble codes, etc. All vehicles such as small trucks and cars are enabled with a special port called OBD II. To check it where it is in your vehicle, get under the driver’s seat or the driver’s side, or otherwise just underneath the dash. There is a connector with 16 pins known as the Data Link Connector or DTC. This is one of the best known ways to make sure that your car or vehicle is OBD II enabled. With newer vehicle models and car models in the market there are also newer places where you could find the connector. Such unique locations include close to the shifter or below the other side of the driver’s seat below the dash. Sometimes this OBD II connector port is also located under a neat cover right below the dash. Some vehicles and car models have a center console in next to the driver’s seat with an open able cap. It may be located inside the center console too, so look inside. The OBD2 code reader will connect into this slot to communicate with your car and act as an interface. It then scans the car information and comes out with a readable content on the display screen. OBD II Trouble Codes These are trouble codes or problem codes that comes out after the scan is run on your car. The OBD2 code reader device will display specific alpha-numeric code that has a specific issue to tell about the problem that the car engine part is facing. This is generally a 5 digit number starting with a letter. The letters are limited so the next time you know exactly where the issue is when the first letter of the trouble code comes up. Example is ‘P’ stands for Powertrain of the vehicle. The second digit is always either the numeral ‘1’ or the numeral ‘0’. This must not be confused with the letter ‘O’ though they look alike. This is because if the second digit on the alpha-numeric code is a ‘0’ it means that the issue is with a part of the car like a generic issue. However, if the digit in the second place of the trouble code is a ‘1’ it means that the issue is a car / vehicle manufacturer – related issue. The third digit is a number related to a sub – system example, an Emission Controller issue. The last two digits are linked with various issues that the system is facing. Hence, it requires more expertise.