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Practical OBD2 functions> support practical OBD2 functions in order to offer you maximum pragmatism: live PCM data streams are vividly displayed on its crisp screen, so you can discover the abnormal parameters intuitively and figure out which part is wrong quickly. Freeze frame data is accurately captured and stored by this code reader, hence you can diagnose your vehicle more efficiently based on the recorded information. Emission test is also provided, including: I/M readiness status test, O2 sensor test and on-board monitor test. These comprehensive tests are bound to protect you from being fine professional electric testing functions equipped with easy-to-read AVOmeter for circuit test, so you have the access to test voltage, continuity and current near at hand. Testing results are displayed concisely on the screen.