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In the manual for the 2000 Sentra, page EC-306, for DTC P0171, P0174 Fuel Injection System Function, it shows as possible causes:

- Intake air leak

- Heated oxygen sensor 1 (front) (bank 1) (bank 2)

- Injectors

- Exhaust fuel pressure

- Lack of fuel

- Mass air flow.

I have read that the Mass air flow sensors are prone to fail on these cars, so you might want to have that checked first.

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12y ago
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Q: How do you diagnose trouble code p0171 for a 2000 Nissan Sentra?
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