Question about 2000 Nissan Maxima

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Hi I have a 2000 maxima and would greatly appreciate if someone knew what the code P0171B Bank#1 System too lean code means....thank you.

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  • ivanvorobiev Oct 10, 2009

    yes this helped very much thank you very much.

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Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust)


Bank 1 is the side of the engine that has cylinder #1.

POSSBLE CAUSE

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor as well.

I would also check all vacuum and pvc hoses for faults. replace any failed hose. Check the fuel filter and the fuel system for proper pressure as well.


Posted on Oct 07, 2009

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What does code system to lean bank 1 mean on my 2000 lexus rx300


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What does P0171B and P1133 mean?


P0171 - Bank 1 system too lean.

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What does P0171B and P1133 mean I have a GMC Envoy 2004 please help


P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

Oct 22, 2013 | GMC Envoy XL Cars & Trucks

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I'M having a P0171B and a P1133 on my 2004 gmc


P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

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Oct 22, 2013 | GMC Cars & Trucks

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Code po171 system too leen bank 1


DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC (Diagnostic Trouble Code) is very similar to P0174, and in fact your vehicle may show both codes at the same time.

I would suggest that you take a look at the front oxygen sensor. Typically speaking the oxygen sensor causes this code to appear. Here is the possible cause list from the manual for your car.

Trouble Code: P0171 - Fuel System Lean (Bank 1)

Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Base engine mechanical problem causing a lean A/F condition
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
Fuel delivery component fault (clogged filter, low fuel pressure)
O2 element is contaminated, deteriorated or it has failed
Vacuum hose is disconnected, broken, leaking or loose

Hope this helps (remember to rating this answer ans leave us a testimonial comment). Thank you for using FixYa.

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I have gotten the codes p0171 and p0134 what are they


P0171 indicates system lean (bank 1). P0134 indicates no activity from sensor 1 on bank 1. You could have a bad O2 sensor or an actual lean condition. Possible causes of a lean condition include a restricted fuel filter on a vacuum leak.

Jun 02, 2011 | 2000 Nissan Maxima

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What do these trouble codes mean p0171 and p0174


po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

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P0171B


It means that your engine is running lean - not getting enough fuel for the amount of air that the engine is receiving. Because your maxima is equipped with a V-6 engine, whatever the problem, it is affecting only bank #1. Bank #1 is always the side of the engine where cylinder #1 is located, or in your case, the left side of the engine as it is viewed while facing the crankshaft end of the engine.
(on a 4 cylinder engine, there is only one bank and it is always referred to as Bank #1)
There are several things that can cause a lean condition including vacuum leaks, a malfunctioning Evaporative Emissions system, a misfiring cylinder (due to bad plugs, bad injectors, or an intake or head gasket leak.), a malfunctioning Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or even a bad Oxygen sensor (O2s) (Nissan sometimes calls an O2s an "Air-Fuel Ratio Sensor") It is even possible for a leaking vacuum brake booster to cause a lean code.
If there are any other malfunction codes present, it may help to pinpiont the cause of the lean code. (Like a P0301 "cylinder#1 misfire detected", in which case, you would address the misfire code first.)
Certain problems, like a leaking brake booster or a bad MAF will usually set lean codes for BOTH banks.
If the P0171 is the ONLY code present, the most likely cause is a bad O2s, but I recommend some diagnostic testing to prove it before spending the mega-bucks that Nissan gets for their O2 sensors.

Oct 10, 2009 | 2000 Nissan Maxima

1 Answer

Hi my nissan maxima has problem


The oxygen sensors in the exhaust pipe are saying the fuel/air ratio is too lean. This commonly happens when the computer in the car reached it's limit putting out the most fuel. Therefore, the mix ratio is still lean.
The possible problem maybe:
The fuel pump not puting out enough pressure.
The fuel filter maybe clogged
The fuel injector maybe clogged or needs to be cleaned.

Were there anymore trouble codes besides the two from Autozone?

Apr 15, 2009 | 2000 Nissan Maxima

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