OBD port not working?

GALAXYAL8230

MEMBER
2011 GMC SIERRA
4.8L
V8
4WD
AUTOMATIC
136,000 MILES

I can't figure out which fuse my OBD port is connected to. I've looked for a cigarette lighter fuse and every other fuse that I could even think of. Actually, I checked every 10 and 15 amp fuses but still can't seem to get my scanner to read the codes. About to check with a voltmeter to see if it's getting power but I'm sure it's not considering when I plug my scanner in I get nothing.

3 Replies

AL514

MECHANIC
4,120 POSTS

Hello, are you getting a no communication message on the scan tool, or is it just not powering up? Also does your check engine light come on when you turn the key to the on/run position? It should last for a few seconds.

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Friday, July 14th, 2023 AT 3:07 PM

GALAXYAL8230

MEMBER
2 POSTS

It wasn't getting power, but I did some more research and found out it was location 53 under the hood's fuse box. It was blown so changed it and now it is reading.

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Friday, July 14th, 2023 AT 3:13 PM

AL514

MECHANIC
4,120 POSTS

Okay, here is the power feed for the Data link connector, if the fuse was blown, I would be sure that nothing fell into the Accessory Power outlet, which is usually the cause on GM's when pin 16 doesn't have power.

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