OBDII FAQ

What is OBD?
What does my Diagnostic Trouble Code (DTC) mean?
How does OBDII work?
What are the advantages of using the OBDII inspection?
How does the OBD II system notify the driver of a problem?
My “check engine” light is on,
but my vehicle is running fine. What should I do?
How do I know if my vehicle is covered by warranty?
How can my vehicle fail an OBD-II test?
My vehicle failed only for Monitor Readiness that read “not ready”
What is a readiness monitor?
Re-setting an Illuminated Check Engine Light or Malfunction Indicator Lamp (MIL)
What should I do if my vehicle failed?
What should I do if my vehicle’s “Check Engine” light is flashing on and off?
Any tips I should follow before I get my vehicle inspected?