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About the application:

Force OBD2: Diagnostic Edition offers full OBD2 diagnostic and logging functionality. It works with almost all cars built after 1996 supporting OBD2. The apk can be paired with almost any ELM327 based OBD2 Bluetooth or WiFi (infrastructure only) module to read and clear DTC's (diagnostic problem codes) from your car. Force OBD2: Diagnostic Edition supports over 2000 SAE diagnostic problem code definitions allowing you to quickly diagnose the trouble without extra searching.Force OBD2: Diagnostic Edition will also read the Engine Readiness status of that car. Engine Readiness tests the status of the cars emissions system which is needed to pass emissions for a lot of cars. You will know that your car can pass an emissions try before paying for the try and failing. Reading engine DTC's can assist diagnose failing Engine Readiness tests. After resolving the problem, Force OBD2: Diagnostic Edition can restart the Drive Cycle by clearing the engine codes and driving the vehicle will cause the Engine Readiness tests to be run.If extra info is needed to diagnose an problem, Force OBD2: Diagnostic Edition can log data from the OBD2 system providing detailed insight into how the engine is performing. In addition to live charting of the data, these extra parameters are logged to an external .CSV file that can be opened with any spreadsheet tool for further analysis. Force OBD2: Diagnostic Edition can log all standard defined PID's (parameter identification) including engine RPM, mass-airflow, car speed, coolant temperature and boost among a lot of others. Force OBD2: Diagnostic Edition supports the following protocols:* J1850 PWM/VPW* ISO 9141-2* ISO 14230-4* ISO CAN 15765-4 (11/29-bit, 250/500baud)Please note that most car manufacturers only implement enough PID's to pass legal requirements and do not implement *all* PID's. This means that even though Force OBD2: Diagnostic Edition supports the PID, your car may not. This is especially common when trying to log boost from a turbo. For example, there are two PID's reserved for Intake Manifold Absolute Pressure and, especially among VAG (Volkswagen Auto Group) and Japanese automakers, neither of the boost PID's are commonly implemented.Another limitation to hold in mind is the sample rate. An ISO 15765-4 (CAN) car with a quality OBD2 module can produce sample rates upwards of 15Hz (15 samples/second). Older cars without CAN might only see 5Hz or less and cheap OBD2 modules from China can create it worse. It would not be advisable to use *any* OBD2 based application to tune boost, timing or air fuel ratio. To tune your car safely, you would need specialized tool and hardware for your car that implements the manufacturers proprietary protocols that are design for very high data transfer rates, not an OBD2 system primarily intended for emissions diagnostics.Be aware that a number of the cheap OBD2 modules I have inspected only help ISO 1941-2 and ISO CAN 15765-4 despite claiming help for J1850 and ISO 14230-4. In addition, a lot of of these OBD2 modules send frames that are incorrectly formed or include garbage heroes. While I have created a good effort to receive Force OBD2: Diagnostic Edition to work with the more famous violators, I don't have fixes for all of them. I would encourage players to spend more and purchase genuine ELM327 or STN devices from reputable companies.