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1999 Mazda b2500

Tiny

grantgilder

July, 29, 2011 AT 12:37 AM

I have a 1999 mazda b2500 with the code po 171 system too lean bank 1 I canged the fuel filter and checked fuel rail pressure it was 39 could it be the fuel pump or fuel pressure regulator or intake gaskets

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1 Answer

Tiny

rasmataz

July, 29, 2011 AT 12:40 AM

http://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Lean fuel condition could be caused by one of the following below:

1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.

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