OBD2 Port Doesn't Communicate, But Has Power: Decoding the OBD2 Port Mystery

Error display on mine help

Thank you for this video
I have an OBD2. The blue piece, when I connect it to the slot, lights up red, but when I start searching for malfunctions, it does not respond and shows me a message that the piece has not connected to the computer, and I do not know what is wrong.

Finally found a video that was helpful.

Very Niiiice. Thanks Much

This guy videos are good

Thank you. I’m having the same problem

Every video I've found on obd2 not connecting has the same outcome. Very basic and of no help. Connector pin drag test was first thing I thought of. And huge problem with anything that has a connector. And there are the ones that find a blown fuse. That is eliminated when the scanner powers up. Got power. Got ground. Pins are tight. No data. Can bus voltages seem to be right, from what I can tell. But checking resistance between two canbus wires finds no continuity. Could be due to no access to get good connection. Not even sure what sort of system/network a 2000 xkr has. Can't find hardly any info about it. Go chasing after can bus likely has nothing to do with actual concern. Just need to get codes and read data

My 2006 Frontier, same problem. Power, no communcation with DMV. Told by garage today they found that a pin in the Data Link Communicator, or the OBD2, needed tightening, when they t4ried to plug one into the other, the pin wasn't making contact where it should. I was told they tightened this one pin, probably #16 which is the communicator pin from what I've read. So that is the problem I had. It is fixed, as of today. Happened last year too.

Very nice job. if am not wrong pin #2 from Obd2 connector corresponds to Can line-H and #4 it's one of the Grounds. 👍😎

Thanks for the tip, I tried this on my 2000 AC30 Toyota Estima but still "trouble connecting" any ideas?

What happens if its a problem with the car computer?

Do you need to discanect battery

Fantastic thanks. Just dirty scart pins. Fixed with a squirt of electrical cleaner and scanner works again

Great info to try! As others said, every other video is only if NO power. I have the situation that your have, power but won't read codes.

#16 is usually the problem

I wonder if GM offers a OBD pin repair or replacement kit
Most Jap cars do not you have to buy a new harness.

would this ground wire from the obd2 port affect my check engine light not coming on or should i look somewhere else

I have a similar problem with my 98 cabrio. My scanner has power but even if the check engine light is on my scanner doesnt pick up codes

Similar issues my 93 grand cherokee 4.0L but my gages don't work, starter cranks but the car does not start and the reader can't read the computer. I've checked the fuses and only the park/neutral position fuse was blown; and when I replaced it the issues still remain.

I need help somebody

2007 Honda civic. Powers obd2 but ultimately gives me message of link error this may be what’s wrong with it but I heard obd2 scanner could be garbage.

Brilliant video..mine has same problem🤘

Tried this now the car won't start

very helpful and useful info thanks

Thank you!

Finally found a video that was helpful. All the other videos say it’s just a fuse facepalm* Thank you!

You didn't mention whether you had to disconnect the battery before fooling with the electronic parts (as in connector). Was a short possible when fooling with them?

About to troubleshoot the obd2 port on this 05 f-650 fingers crossed

Great video great help thank you

Vehicles will not pass inspection in NH with a "Check engine light". I'm wondering what the inspection station will do when they can't read a fault but the check engine light is on.

thank you for a quick, straight to the point informational video!

Thank you that was very useful as I have the same non communication problem on my Range Rover 4.2 supercharged. I hop mine is an easy fix like this one. Bet it ain't lol

I tried this already and it didn't work on mine but the code reader does turn on and I get link error my car still just cranks no start

@DCF Garage I noticed the trouble code on your scanner was P0741 and it's on a GM vehicle. What did you do for a fix on that code? I have a 2008 Chevrolet Colorado with that same code.

Okey, im gonna try this tomorrow. Looks promesing.

mine used to connect to torque app . but now it doesnt work.only in one specific app it does connect to ecu. which i can't explain why?? i've replace the ddapters . and both works fine with torque pro in another car. i guess there's something wrong with my obd port itself. i'll give atry though. thanks!!!

have a similar issue on my 5yr old Tacoma. If I try to wiggle the harness while plugged into the obd2 scanner, it'll lose connection and the scanner screen will flicker. I'm going to try this.

Gonna try this tommarow and see how it holds up

Got the same problem

I have issue like this on my car except when I hit the link button on my innova obd it just turns off. Works when I don't have my keys in the ignition but obviously it doesn't connect then.