OBDII port not working

128,000 MILES • 1.3L • 4 CYL • 2WD • AUTOMATIC
Avatar
RYAN L
  • ✓Experienced Mechanic
  • 273 POSTS
Hello all,

I recently changed the radio head unit in my car, far from the first time I have ever done that, with the battery disconnected. Then when I reinstalled the radio and plugged the battery back in the electric door locks stopped working, the D in the shift indicator blinks, the check engine light came on, and the OBDII port does not work. I have checked all the fuses under the dash and they are all fine. The car still starts up and runs like normal.

Being unfamiliar with Hondas, any help would be much appreciated. Thank you!

-Ryan
Jan 20, 2021 at 5:07 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Hi Ryan,

I attached the diagram of the data link connector. Check for power at 16. If not, check the fuse listed in the underhood fuse block.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-wiring

Roy
Jan 20, 2021 at 7:19 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle