Another round of "What's this wire?"

[barmanvarn]

Hard to see but it's in the red circle in this pic.


Looks like some kind of sensor. The end of the wire sort of just clips on to the end of whatever is coming out of the engine.

The wire runs around the front of the valve cover, down the other side, and goes into the firewall. When changing the VC gasket, I found a good section of the wire had dry rotted so I need to either replace the bad section of wire or replace the end that clips on.

Was just wondering what it is.

thanks