OBDII port not working

2005 HONDA CIVIC HYBRID
128,000 MILES • 1.3L • 4 CYL • 2WD • AUTOMATIC
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RYAN L
  • ASE Certified Mechanic
  • ASE Certified Mechanic
  • 272 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 1:07 PM
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ASEMASTER6371
  • ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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 3:19 PM
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