If you’ve had an emissions inspection done on your vehicle, or have ever had a check engine light come on, you’ve most likley heard the term “OBDII” before. But do you know what it means?
OBDII is an acronym for On-Board Diagnostics II. OBDII is a car’s self-diagnositc tool, it can perform basic diagnostics on itself and can give a broad idea on what is or isnt causing a problem. If you own a car that is model year 1996 or newer, you have OBDII. Though some vehicles from madel year 1995 have OBDII, it was not legally required.
What Can OBDII Do?
OBDII’s most common use is as a self-diagnostic tool. For example, whenever your check engine light comes on, OBDII also generates a code which shows why the light is on. For example, if you have a misfire, your check engine light would come on and OBDII would produce a code like P0300.
Are there Downsides to OBDII?
While in some areas OBDII can be very speific, in others it can be broad. For example, code P0300 means “Random or Multiple Misfires.” While this information is useful, it doesnt clarify why those random misfired happened, it only shows that misfires happened. OBDII is best used as a tool to “point you in the right direction” as compared to a definite diagnostic.
Why is OBDII Important?
While OBDII helps diagnose issues, like a misfire, OBDII also helps keep our air cleaner by monitoring emissions systems. OBDII is also what makes State Inspections possible. OBDII is also responsible for speeding up diagnostic times on engine related repairs.