Where is the diagnostic port located?

Tiny
DON BREIKJERN
  • MEMBER
  • 1999 OLDSMOBILE 88
  • 6 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 122,000 MILES
For insurance purpose want to plug in a device into the diagnostic port. Where is that?
Sunday, December 4th, 2022 AT 8:40 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The onboard diagnostic port is located under the steering wheel.
See attached picture for the location reference.

Here is a helpful guide on how to check codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let me know if you have any questions.
Thank you.
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Sunday, December 4th, 2022 AT 7:47 PM

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