![]() ![]() In 1996, a new specification, OBDII, was made mandatory for all cars sold in the United States. The codes varied by manufacturers and make, which made it difficult for mechanics to diagnose the problem. OBD system started in the early 1980s with a simple function to turn on the malfunction indicator light or “idiot light” when it detects a malfunction. With a code reader or scanner, you can access one or more OBD2 codes that indicate the issues. When the system identifies an issue, it turns on the check engine light and provides real-time data in addition to a standardized series of Diagnostic Trouble Codes (or DTCs). On-Board-Diagnostic (OBD) Trouble Codes are one way your vehicle reports self-diagnostic results.
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