A Manual for All Cars with OBD 2

If you are looking for an inexpensive tool to diagnose a check engine or service engine condition, then the ELM327 may be just for you. The ELM327 simply plugs into the diagnostic port under the drivers side steering wheel and communicates with your smart phone, sending data in real time with the vehicle running. It will show RPM, vacuum, and more. It will display any fault codes that need attention so you can decide the urgency of the malfunctioning part and allow you the necessary data to decide if it requires immediate replacement. The ELM327 cost substantially lower than any other diagnostic tool. You can download the app for your phone and you are good to go.