(Often this is under the 'edit' menu / 'find', in Internet Explorer, also use Ctrl+F). You may want to search for the DTC you need using your browser's "find" feature. This standard uses a letter to designate the system and four numbers to further identify and detail the malfunction as listed below. The second code is referred to as a P-code and follows a structure required by law and defined by the Society of Automotive Engineers (SAE). The first code is a numerical code assigned by the factory. These codes follow a standard format and are known as Diagnostic Trouble Codes (DTCs).ĭTCs are assigned two codes. A Malfunction Indicator Light (MIL) in the instrument cluster alerts the driver to the fault and the need to have the system checked for fault codes. Vehicle emission levels are constantly monitored by the OBD II system and malfunctions are recognized and recorded. This system monitors operation and function of all engine management system activity and automatic transmission operation to insure compliance with specified emission levels. From model year 1996, vehicles manufactured for the North American market are equipped with a Government required diagnostic system known as On-Board Diagnostics II (OBD II).
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