OBD2 port won't turn on or connect to scanner
The port failing to send a power signal leaves the scanner completely dead, stopping you from reading diagnostic codes even at parts stores like AutoZone. This power loss can sometimes be traced to the fuse for the radio and dome light.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Checking related fuses such as the radio and dome light fusesDid this help you?
- 2Look behind the dashboard to locate the car's actual white data link connector, which is often unclipped and tucked away or zip-tied to a wiring harness.Did this help you?
- 3Unplug the black dealer-installed GPS tracker to free up the real OBD2 connection.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“i haven't been able to scan the code unfortunately i'll be trying to fix that in the morning. the obd2 port doesn't send any sort of signal to turn a scanner on”source ↗
“i gotta figure out why the obd2 port isn't working. i currently have the fuse for the radio and the dome light, maube that has something to do with it”source ↗
Where this came up
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