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P171 and p174 codes for ford - 1998 Ford Windstar

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Are the codes p0171 and p0174? p0171 system too lean (bank #1) p0174 system to low ( bank # 2) o2 sensors will go in pairs.

Posted on Aug 31, 2010

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Posted on Jan 02, 2017

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  • 44 Answers

SOURCE: I have a 2003 GMC Denali with Codes P171 &

More likely it's the intake manifold gasket leaking. They can become flat and **** air in passed the gasket, causing a lean condiiton.

Posted on Oct 02, 2009

  • 1201 Answers

SOURCE: Check Engine Light On

have the 02 sensors checked

Posted on Jan 21, 2009

bschilz
  • 2049 Answers

SOURCE: 99blazer s10 trouble codes p171/p174

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.

A code P0171 may mean that one or more of the following has happened:

  • 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.
Possible solutions include:
  • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure

P0174 is identical to P0171, except it indicates the problem exists on Bank 2 as well.

Posted on Nov 22, 2009

dmfixit
  • 226 Answers

SOURCE: 1999 Chevy silverado 5.3 engine setting codes p171

oxygen sensor failure
P0171 System too Lean (Bank 1) - Read Our Article On Oxygen Sensor Codes For Help With This Generic Check Engine Light Code
P0174 System too Lean (Bank 2) - Read Our Article On Oxygen Sensor Codes For Help With This Generic Check Engine Light Code
hope this is a bit of a push in the right direction ...

Posted on Feb 04, 2010

toneman2121
  • 775 Answers

SOURCE: 1998 mystique. engine light always on. what are

http://www.aa1car.com/library/ford_lean_codes.htm

Posted on Apr 21, 2010

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I have a 2004 flex fuel tahoe 5.3. P171 and p174. Codes on. Have replaced fuel pump , pressure reg., plugs and fuel filter. Hard to start but runs fine for awhile then starts acting up.


2002 Chevy Tahoe + P0171/P0174 - Chevrolet Forum - Chevy ...

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1 Answer

Freelander 2002 code p171


Google the Codes

That is how you find out
& learn things

Apr 02, 2013 | 1998 Mercury Mountaineer

1 Answer

P507


You have a lean fuel condition.I would check the fuel pressure and if its not within the specs i would change the fuel filter and fuel pump.

Jan 24, 2012 | 2002 Chevrolet Tahoe

1 Answer

The CEL is on and codes that came up on scan are P171 & P174, replaced O2 sensors and it has not changed what next?


There is an Intake Air Temperature (IAT) sensor mounted in or near the air filter housing. This is a simple thermistor sensor that helps the PCM determine the air temperature of the air entering the air filter and ultimately the engine intake. Sounds like you might have a faulty IAT sensor or a wiring issue for the IAT sensor.

Feb 28, 2010 | 1997 Ford Explorer AWD

1 Answer

My check engine light came on 2004 ford taurus had a friend the plugged one of those code readers in got two codes po 174 and po 171 what do they mean


P174 means Oxygen sensor was slow in switching Single, Right or Rear HO2S - Fuel control

P171 means Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S - Fuel control

Visit http://www.troublecodes.net/Ford/
for a comprehensive code listing for your car.

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Jan 08, 2010 | 2004 Ford Taurus

1 Answer

2001 E250 4.2 codes po 171 174 172 175


P171 Lean to bank one
P172 Rich to bank one
P174 Lean to bank two
P175 Rich to bank two.

These are conflicting codes. I would suspect that you have a bad MAF sensor. take it out and try and clean it before you replace it. It could also be a bad O2 sensor. But unlikely that both sides went bad at the same time.

Dec 20, 2009 | 2001 Ford Econoline

1 Answer

I have a 2003 GMC Denali with Codes P171 & P174 lean on both banks. What is the problem? Fuel pump?


More likely it's the intake manifold gasket leaking. They can become flat and **** air in passed the gasket, causing a lean condiiton.

Oct 02, 2009 | 2004 GMC Sierra Denali

2 Answers

P171 and p174 check engine light


Normally you can disconnect the battery for a few minutes and this does the trick. If the light comes back on, you may need to read the codes again. And, if it faults the MAF...you know it is not that and may be something else.

Mar 10, 2009 | 1997 Ford Explorer AWD

1 Answer

Check Engine Light On


have the 02 sensors checked

Jan 20, 2009 | 2001 Ford Explorer

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