Hello guys (yes i know me again)

After fixing my knock sensors and Engine cooland temp. sensor. this morning when i drive to work check engine like comes back on. i check the codes and now it's giving me 03-02 which stands for EGR System High/Low Flow? can i get some feedback n this? i have never hear about it. and i also got 07-07 which stands for Rear Heated 02 Sensor. can someone just tell me where to buy one and how to change it? could what the ECU is giving me be wrong? thank you n advance for the help and replys

P.

 

have u fix your rear o2 sensor? if not, fix that first. it may be triggering ur old codes. u can get rear O2 sensor off courtesy nissan i believe.

after u fix all ur problem, don't forget to reset ur ECU. good luck.

 

Yeah I'll fix that first, but can someone tell me what EGR System High/Low Flow is. what would it do and how do i fix it? once again my problem is huge power lost after 2nd gear and specially at high rpms. before i bought the car install this pipe thing under the car that looks really s***ty. i can take a pic of it and let you guys see. but thanx for the info