Yes, it could be the connector, or it could be a break in the wiring, or it could be the connector at the ECU. Or it could be the ECU itself.

Don't just cut the connector off and splice on a new one. You need to troubleshoot and find where the problem actually is, or else you'll just end up replacing everything and still might not find what's actually wrong. Blindly replacing stuff is a waste of time (and usually money). It helps to have a factory service manual, or at least a connector pinout from a website, and then you can test to see if you have power at the connector. Then you can check continuity between the connector and the ECU, and make decisions from there.

And please stop calling it a "clip". I know lots of other people say that too, but that doesn't make it any better..
It's a connector..