Megane mk2 2008 1.4 16v sensor help

[Ryan1000]

Hi everyone, just got a mk2 megane 2008 1.4 16v, got it cheap with a few jobs needing doing, just serviced it, oil, filters, plugs, also cleaned throttle body as revs are a little low 600/800 rpm, also bounce up and down a little, but its still the same, out of ideas, temp is always spot on, can anyone tell me what the sensor is for that sits right next to bottom of radiator on drivers side, has 3 wires and a plug, wires have either been cut or have snapped, wondering if it has something to do with revs being low, many thanks in advance

[Stranger]

Hello Ryan and welcome along

Not too many folk look in here so you might be better posting your question in the problems / questions forum