Hello
DTC P0171 (BANK 1), P0174 (BANK 2) FUEL INJECTION SYSTEM FUNCTION
(LEAN)
Possible Cause:
- Intake air leaks
- Heated oxygen sensor 1 (front)
- Injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor
You can find the location of the O2 sensor in this document:
http://www.nissanhelp.com/Ownership/...TIFICATION.htm