Where is the 2019 Nissan Altima’s OBD port location?

I just bought a used 2019 Nissan Altima, and I’m already having some problems with it. I’d like to run a diagnostic test to see what the issue is, but I don’t know where the OBD port is. Where can I find it in the 2019 Altima?

Melanie Johnson · Answered on Feb 14, 2023
Reviewed by Shannon Martin, Licensed Insurance Agent.
Oh, no! Sorry to hear you’re having car trouble. The OBD port location in a 2019 Nissan Altima is below the dashboard, to the left of the steering column.
The Onboard Diagnostics II (OBD-II) port monitors your Altima’s emissions, engine, and transmission performance. It will allow you to access your Altima’s internal computer and run tests and diagnostics.
You’ll need an OBD-II scan tool to run a diagnostic test. Simply follow these three steps to read trouble codes:
  • Plug the scan tool into your OBD port
  • Power on the scan tool and crank your Altima’s ignition
  • Press “Scan” on the scan tool and follow the directions on the screen
Within seconds, the scanner should provide you with a Diagnostic Trouble Code (DTC) to help you get to the root of your car trouble. Here are five common codes to look out for:
  • 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 to you!
View full answer 
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.

Easiest way to compare and buy car insurance

No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
Find insurance savings — it's 100% free