Question

On my 2001 Nissan Pathfinder 3.5L what are the engine codes P0175, P0171, and P0174?

Answer 1

HI there,

P0171 and P0174 are for lean fuel trim mixtures on bank 1 and bank 2. On these this is normally caused by a problem with the mass air flow sensor.

P0175 system to rich bank 2. This can be an issue with a faulty O2 sensor. I would start with the mass air flow sensor and clear the codes.

Answer 2

P0171 NISSAN Code - Fuel Injection System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_nissan.html

P0174 NISSAN Code - Fuel Injection System Too Lean Bank 2
Read more: https://www.autocodes.com/p0174_nissan.html

P0175 NISSAN Code - Fuel Injection System Too Rich Bank 2
Read more: https://www.autocodes.com/p0175_nissan.html