I'm currently taking apart an old vehicle which was just lying around. While dismantling the exhaust manifold, I noticed there was a cable that connects to its base, right before the point where it connects to the exhaust pipe. I couldn't find the socket to properly disconnect it at that time so I just snipped the cable.
Please I'd like to know if that cable has any significant purpose. My guess is it's some kind of sensor. If so what sensor is it? And what are the downsides of driving without that sensor?