Hi everyone
Need your help with this code. I used OBD II scanner and got P0305 code. I did change both intake and exhaust sensors but the code is still persistant. I took the X to an independent shop and got couple codes
1- 18: EWS signal. The tech said it is the key. He told me to use another set of key
2- 204: Idle control. He said my X has abnormal idle. He think I have my have air vacum leak or some sort of things. Does anyone have this experience before?
3 & 4: No description.
any help would appreciate.

ALX5