You may have come across the ‘Check Engine Light’ that appears when car ECU detects and stores a fault code generated by a sensor. In that case, you need to scan your vehicle with OBD scanner to read the codes and fix the problem. If you are an auto-enthusiast or a person who believes in ‘do-it-yourself’ you can do this all by yourself. All you need is a Bluetooth or WiFi OBD scanner that will connect with your Android phone and assist you in reading error codes. You can use any good OBD Android app to read and get details about error codes and fix the car accordingly or erase the code and check if it reappears.
The tools that are required to scan the OBD II are as following:
1- A WiFi or Bluetooth ELM adapter / scanner / reader [ELM327].
2- Android phone or tablet.
3- Android application: Torque Lite, Torque Pro or Dashcommand (See Google Play Store to find any other alternative)
Connect ELM Scanner with OBD II connector port of your car and turn on the ignition. Do not start your car at this point. The LEDs will start blinking on scanner notifying you that it is ON and working. Now connect the scanner with your Android phone or tablet over WiFi or Bluetooth. Once connected, open the application and let the app scan the trouble codes. We recommend Torque or DashCommand apps for scanning purposes as these supports most cars and offers various features. (Torque Pro is the paid version while DashCommand full version is available as in-app purchases)
There are various kinds of cheap and expensive WiFi & bluetooth ELM OBD scanners available that you may use with your Android phones or tablets. These will not only help you save money on expensive OBD scanners but also save your money that you will pay at auto repair shop to get your car scanned. If you have knowledge about how internal parts of your car work, you may change the faulty parts by yourself or take help from an expert.
Note that not all cars can be diagnosed with ELM OBD scanners and Android apps. Some manufacturers have restricted access to ECU and only accessible through company’s owner scanner. Make sure that contacts of connector are clean and not corroded. Clean them properly if you are not able to connect and scan.