Infiniti Repair Questions? Ask a Mechanic for Answers ASAP
Another thing to look at would be exhaust leaks around the 02 sensor on bank 2. If it was a bad maf it would be also giving you a p0171. Also check the pcv system for vacuum leaks.
Bank 2 is the passengers side.
Ok I would double check the exhaust leaks then since the only code to return is the p0174.