P0174 NISSAN -

Question

Getting codes 0171 and 0174

Answer 1

Since you are getting a "Lean System" for both banks, then you could start by checking for intake leaks. If no leaks are found you may have a bad Mass Air Flow (MAF) sensor or bad O2 sensors.

 

P0171 NISSAN - Fuel Injection System Too Lean Bank 1

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P0174 NISSAN - Fuel Injection System Too Lean Bank 2

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