OBD codes are most frequently referred to as OBD-II, which has been the code type since 1996.
Tip: OBD codes refers to nearly the same thing as DTC codes, therefore you will often hear them used interchangeably in the automotive industry. There are two acronyms to be aware of when it comes to discovering more about Check Engine Lights. While that sounds daunting, with a little patience, tackling basic diagnostics will give you useful knowledge about your vehicle and will also allow that Check Engine Light to do what it is really supposed to do: be your guide. There are literally hundreds of different codes a Check Engine Light can represent. By preparing yourself with a little automotive knowledge, a helpful tool, and general background information on what this light is actually trying to tell you, you will not only gain more peace of mind, you will also develop a closer relationship to your vehicle.ĭiagnostic trouble codes (DTC) are automotive computer codes stored by the on-board computer diagnostic system (OBD) in your vehicle. 
It can be quite intimidating to see that little light on your vehicle’s dashboard suddenly illuminate, but in reality, it is not something that should paralyze you in fear right away. The Check Engine Light turning on is usually a topic car owners try to avoid talking too much about.
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