How can I check the OBD2 port?

Tiny
DCKMASON
  • MEMBER
  • 2003 HYUNDAI ELANTRA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 129,800 MILES
Aug 2024 connected OBD2 scanner from AutoZone to check 'EC' code (been on 5+ yrs), no related issues with car driving, connection np, got codes.

Mar 22, 2025 new issues arrived (dash gas gauge floating around) tried to use AutoZone OBD2 scanner, connected to cars OBD2 port, scanner does not come on.

How can I check the OBD2 port? No, I don't have a voltmeter. I saw from the web the slot on the OBD2 port to check would be the top left row, first slot or number '16' slot for power?

Is '25' the right fuse for the audio/radio on the inside fuse box?

Thanks in advance. Ernest here in Virginia Beach, VA
Saturday, March 22nd, 2025 AT 2:43 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,162 POSTS
It sounds like the OBD data port fuse is blown, let's check fuse#25 in the fuse panel under the dash on the left side and go over this video. Fuse #25 powers the port and the radio.

https://www.youtube.com/watch?v=6Tlg3JmgNSQ

The second fuse for the radio is fuse #9 in the same panel. Pull the fuses for inspection and get back to me please.
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Saturday, March 22nd, 2025 AT 11:56 AM
Tiny
DCKMASON
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  • 5 POSTS
Thanks so much, you saved my daughter a great deal of money.
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Sunday, March 23rd, 2025 AT 11:28 AM
Tiny
DCKMASON
  • MEMBER
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FYI, I connected the scope to OBD2 port and got the 'EC' code of P501?
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Sunday, March 23rd, 2025 AT 12:37 PM

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