Topic: 94 22re codes 52 and 71

[greenjacob]

52 is a knock sencer? is this needed truck runs fine

71 is egr it has a header and its ca truck 2 o2 sencers and the po took out he cat.

kinda looking to put a cat back in and fix the egr code any ideas? do i have the rigth codes? what migth cause them?

[greenjacob [OP]]

Fixed code 52 I plugged it in ha 71 still on