Best OBD-II scanners for 2023, tested:
An On-Board Diagnostics version two port is a standardized diagnostic interface included in nearly all vehicles made in or after 1996, which is when the OBD-II specification was made mandatory for all cars sold in the United States.
OBD-II ports communicate with the vehicle's on-board computer system to retrieve data, including engine speed, fuel consumption, cylinder performance, intake air temperature, and much more. Included in this data can be fault codes, known as DTCs, which are set by the vehicle's computer system when a fault is detected with a particular component.DTC stands for Diagnostic Trouble Code.
Nearly all modern OBD-II scanners will summarize what the error code is alongside the five-character alphanumeric code. For some of the more advanced models, there's even a code look-up function that will further explain what the fault code is referring to and what might be causing it. In the case of the Bluetooth OBD-II scanners, some of the apps will also include video explainers pulled from YouTube that will show you how to further diagnose and even repair the faulty components responsible for the code.Although the exact location of the OBD-II port can vary from vehicle to vehicle, the port is typically located around the footwell on the driver's side, beneath the steering wheel and above the pedals.
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