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2000 Nissan Maxima DTCs P0171 and P0174

Tiny
CBUSS
  • MEMBER
  • 2000 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
I look up these codes and they are System Too Lean on Bank 1 and Bank 2. What do I do to fix these?
Thursday, June 5th, 2008 AT 11:29 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Cbuss,

It means fuel supplied is too low.

Either you have a fuel pressure problem or the fuel filter is clogged. Try replacing the fuel filter first.
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Thursday, June 5th, 2008 AT 12:35 PM
Tiny
CBUSS
  • MEMBER
  • 2 POSTS
Could it be the O2 sensors?
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Thursday, June 5th, 2008 AT 12:46 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Cbuss,

Yes, if the O2 sensors are out, it could give you the code also.
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Thursday, June 5th, 2008 AT 1:00 PM

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