hello hope someone can help gave my engine a clean today and as i looked down the front of the engine close to what i think is the secondary air pump dont know as i`ve only had the car three weeks by the way its a 2003 leon cupra there is a wire with what looks like a sensor on the end of it clipped to the pipes that come off the secondary air pump it looks like it fits onto the air con compressor as there is a nut facing upwards on it looks like its broke off there can anyone tell me if i`m right and what is it used for as everything seems to be working including the air con i really do need some help as i dont think it will be covered by warranty as it looks like someone (last owner) may have broke it by accident and cant get a manual for this car so i can check myself hope some of you can help thanks