Portable Generator open ground

road-runner wrote:

Teamfour wrote:

road-runner wrote:
The "open ground" diagnosis is not correct.

The open ground diagnosis is correct. Straight from the folks who make the EMS:

I'm curious if you read the rest of my post where I explained why it wasn't correct? If the EMS doesn't have its own independent connection to ground (which it doesn't), it cannot positively diagnose an open ground. The EMS is sensing the lack of a neural-ground bond, and if it's not present, it assumes the fault is an open ground, when it in fact has no way of determining if that assumption is correct or not. In the floating output generator situation, you could drive the world's best ground rod, positively connect it to the EMS, and it will still say "open ground".

Thanks for the info but it is irrelevant to solving the OPs problem of clearing the EMS code and more of a nerd reply to show how smart they are.