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[Jan Suhr]

On my 3.2L Omega 2002

I have a problem with my ODBII port, I can't read any codes with only IGN on, it read with engine running.

When I was at the inspection the other day they mentioned this but didn't give me any remarks on it.
So by that I conclude that the problem is in the car


Why is that, it has been working properly earlier, could it be something broken in the connector?

[YZ250]

Out of curiosity, if you connect the code reader and start the engine and then turn the key back one click so that the engine stops but the ignition is still on, does the code reader read the vehicle then. 
I seem to recall that I had to do this on odd occasions with my 3.2 when using a generic code reader.
Although you say it was working fine previously. 

[TheBoy]

Ign on should be enough.

Are you getting power on the ODBII port with ign off?  Should have perm 12v supply to it.

[TheBoy]

Out of curiosity, if you connect the code reader and start the engine and then turn the key back one click so that the engine stops but the ignition is still on, does the code reader read the vehicle then. 
I seem to recall that I had to do this on odd occasions with my 3.2 when using a generic code reader.
Although you say it was working fine previously. 

The keeps the W contact at 12v.

[Jan Suhr]

Ign on should be enough.

Are you getting power on the ODBII port with ign off?  Should have perm 12v supply to it.

Yes it gets power when everything is off, but the reader needs ignition on to connect and link to the car.

Everything looks OK with IGN on until I want to read codes or erase codes then it says it can't link to vehicle.

Same problem had the guy at the inspection.

Just before the inspection I got connected with engine running to see if there was any codes that could cause a notification at the inspection. And it works as expected then.

I'll check on my other 2.6 Omega and see how it behaves.

[Jan Suhr]

Same thing with my 2.6L Omega, can't link until I start the engine.

But it do work if I turn it of to IGN, then it can connect.

[cam.in.head]

i think it depends on the actual reader especially if it's just a cheaper no frills one . mine only reads basic info with ign on but with engine running will do g box codes as well .