my 98 civic has a D16aY engine.
Greetings once again ya'll.

So I'm having a few problems with my 1998 Honda civic Automatic with 165k Miles.

Recently My car was throwing codes for:
P0135 o2 Sensor
P0325 Knock Sensor

So I replaced all of these parts and the codes keep coming back. All the parts where purchased from Autozone and have warrenty and I don't think that is the problem... Could it be the ground or fuses? And what should I do besides spending a ridiculous amount of money taking it somewhere...

Thanks in advance.

 

The codes where cleared with an OBD scanner but continue to return within 30 seconds of clearing.. Same thing happens when I did the "unplugg ground" trick.