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I spoke with a few friends who do their own car repairs or who are professional mechanics. Their recommendation with any OBDII device is to capture any data that the device can capture and log it as long as the device or connected computer/tablet/phone can log it. It is better to have a data point and not need it than to need a data point and not have it.


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That's not what it was designed for but yes it's possible. The OBD port gives you access to one of the vehicle's CAN buses (they often have multiple, the safety critical features are on a separate one and they only communicate through a gateway that relays only some information). In there, you can either introduce yourself as a diagnostic device (as the ...


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OBD-II stands for On-board diagnostics. It refers to a vehicles self-diagnostic and reporting capability. The real information is within the network in the wiring harness. It's called the CAN (Controller Area Network) bus. It's a design standard that allows for micro-controllers and devices to communicate with each other within a vehicle WITHOUT a host ...


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Ultimately the answer is yes you can. To qualify this answer, though, you can only control some things, but not all things, then only on some vehicles. You can do simple things through the port, such as turn the A/C pump on, or any other thing which is controlled by the computer (PCM). As an extension, I'm sure you could rev the engine using the same methods ...


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I'm not a mechanic but I think what you have been told is true. That is, the wrench light is a separate system that will not appear with OBD2 code readers. If you think this stinks, I agree. For the record, I own a OBD2 reader. It has come in handy for my 3 cars. Recently, the wrench came on (for the first time ever) with my Ford Freestyle. The car ...



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