How to distinguish between OBD and OBD2?

1 Answers
DelJameson
07/29/25 6:55pm
The main difference between OBD and OBD2 is that the initial OBD did not have self-test functionality, while OBD2 is equipped with an onboard self-diagnosis system. Here's more information about OBD: 1. OBD stands for "On-Board Diagnostics," and its function is similar to the black box on an aircraft. The presence of OBD allows for monitoring of vehicle exhaust emissions. If the emissions exceed the standard, the system will automatically issue a warning via an indicator light. 2. OBD2 is an improved version based on OBD, which adds an "onboard self-diagnosis system" to strictly monitor vehicle exhaust emissions.
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