How many OBD interfaces does a car have?

1 Answers
MacJourney
07/29/25 7:42pm
Currently, most cars use a single ECU for the engine, transmission, ABS, etc., meaning there is typically only one OBD diagnostic interface. Explanation of OBD: OBD is translated into Chinese as "On-Board Diagnostics." This system continuously monitors the engine's operating conditions and the working status of the exhaust after-treatment system. Notes on OBD: When a fault occurs in the system, the Malfunction Indicator Lamp (MIL) or Check Engine warning light will illuminate. Simultaneously, the OBD system stores the fault information in memory. Using standard diagnostic tools and interfaces, this information can be read in the form of fault codes. Based on these fault codes, technicians can quickly and accurately determine the nature and location of the issue.
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