20v continued, codes

[deaf_rattle]

checked for codes today
21 and 52
02 sensor and knock sensor

this will be because they are both unplugged.

i can plug in the 02 sensor, but i need a new plug for the knock sensor (might just try and find the right sized spade terminal for now)

now the check engine light comes on after about 2 mins of idling, would that be because of those 2 error codes? or is there something else i might need to look for?

cheers