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2014 Nissan Sentra P0101, P0171

  

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Topic starter

There is a P0101 code for mass airflow sensor.  I changed out the sensor and reflashed the computer, and the code came back along with another code P0171.  I cleaned the throttle body and smoked the intake.  I checked for vacuum leaks.  I didn't find any. I drove the car for 16 miles at 55 miles an hour and both codes came back.


4 Answers
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https://www.autocodes.com/p0171_nissan.html

Check the fuel filter, fuel pump, dirty injectors, etc.


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Posted by: @keith1keith

reflashed the computer

That's a bit extreme. Or did you mean that you cleared the diagnostic faults?


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Topic starter

Yes, I mean I cleared the diagnostic faults.


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Here's the link to Nissan Service Bulletin NTB16-027d which addresses your issue. It's worth a try.

https://static.nhtsa.gov/odi/tsbs/2018/MC-10141436-9999.pdf

 


This is very helpful. Thank you


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