Hi all, the carly's check engine light is on, when the ignition is turned on i am getting 4 flashes, now from my flash code list 4 flashes points to the knock sensor, i am woundering if this is an easy diy job? where could i obtain a knock sensor?the main dealer here in Exeter wants £110 plus...

Hi all, the carly's check engine light is on, when the ignition is turned on i am getting 4 flashes, now from my flash code list 4 flashes points to the knock sensor, i am woundering if this is an easy diy job? where could i obtain a knock sensor?the main dealer here in Exeter wants £110 plus...