Where is the 2020 Nissan Altima’s OBD port location?

I just got an OBD scanner so I can figure out what’s wrong with my 2020 Nissan Altima, but I can’t seem to plug it in. Where is the OBD port in the 2020 Altima?

Melanie Johnson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Sorry to hear that your Altima is giving you grief! The OBD port location in a 2020
Nissan Altima
is underneath the dashboard, at the top right of the pedals.
The Onboard Diagnostics II (OBD-II) port will allow you to access your Nissan Altima’s internal computer to run tests and diagnostics. While you can manually diagnose your Altima, an OBD-II scan tool will help you run a more accurate test—so good on you for having one handy!
Follow these steps to run a diagnostic on your Altima:
  • Plug the scan tool into your OBD port—it will be visible above the brake pedal!
  • Power on the scan tool and crank the Altima’s ignition
  • Press “Scan” on the scanner and follow the directions on its screen
Within a few seconds, you’ll be able to
read a Diagnostic Trouble Code (DTC)
that should help get to the bottom of what’s wrong with your Altima. Common codes to look out for include the following:
  • P0420: catalytic converter isn’t functioning properly
  • P0101: mass air flow sensor isn’t working properly
  • P0300: two or more cylinders are misfiring
  • P0303: cylinder number three is misfiring
  • P0128: coolant temperature is lower than it should be
Best of luck!
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