I received the replacement harness and still the same problem. The A/F sensor male connector will not lock onto the harness female connector no matter how much pressure I apply. The harness female connector has a gasket at the rear that the male connector is suppose to pass over in order to seal moisture from the connection. The A/F sensor connector will not move past the gasket at all so while it will make a connection and no MIL will appear, one good bump could cause the connector to separate and here come the DTCs. I'll reach out to the seller again and see what's next. This is getting ridiculous.