started car last night and cel stayed on for 10 mins then went out the come back on when i press the throttle but just for 2 seconds and stayed out since, so this morning pluged black plug in and came up with these codes and it was re set a month ago so not old ones...not bothered for the 21 water temp but do you think its knocking if 22 comes up or is the sensor knacked???? going the re set it and see if it comes back, i duno

 

Yeah, its the sensor mate
There is no code for actual knock (hence the use of det cans ect), the sensor detects knock then retards/advances the ingition via the ecu

 

right cheers for that mate, re set it all again and no error codes have come up now (took a bit of a drive to get the cel light to start flashing good). think its a bit strange but when i started it yesterday it did seam to take a bit longer and may of miss fired for a second
anyway ive got my old sensors off the old engine in garage, i will change it and see
just glad you said it dosent sense knock and light up