Question about Ford Windstar

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02 ford windstar cel on code po171 po174 lean mixture both banks how to slove

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  • Ford Master
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Recommend check for a vacuum leak especially at the back of intake where all the vacuum hoses connect. If all the hose seem good then you will need to replace the intake plenum gaskets. Common problem on the Ford 3.8 liter engine.

Posted on Nov 07, 2014

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Posted on Jan 02, 2017

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SOURCE: 1995 Ford Windstar LX 3.5L Error Codes?

  1. P0171-bank 1 lean, usually oxygen sensor
  2. P0174-bank 2 lean, usually oxygen sensor
  3. PO402-EGR ins. flow, Clean EGR exhaust tubes and replace sensor should fix this problem

Posted on Dec 31, 2008

  • 290 Answers

SOURCE: ford windstar codes po171 and

Try cleaning the MAF. Here is more info on the codes:
http://www.aa1car.com/library/ford_lean_codes.htm

Posted on Apr 14, 2009

  • 1 Answer

SOURCE: 1999 ford windstar 3.8 eng miss

remove the plenum take out injectors have them rebuilt change your plugs should clearup problem.  
ps if you have blowby problem could come back in a few months of driving.

Posted on Jun 01, 2009

  • 842 Answers

SOURCE: Generic code PO171 system 2 lean bank 1 generic

This can be caused by a faulty mass air flow sensor

Posted on Jul 09, 2010

  • 1565 Answers

SOURCE: Codes P0171 & PO174 bank

http://leckemby.net/windstar/windstar01.html

Posted on Oct 09, 2010

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2000 3.0 Flex Fuel Ford Ranger. Whenever I run E85 in the truck, the CEL comes on and reports PO171 and PO174, lean on banks 1 and 2. If I run all the E85 out, fill up with regular 87 octane, clear...


best answer here is that the sensors are not set for the poor quality fuel ( the octane ratine is probably to low for the ECM to properly maintain the air /fuel mixture ) you have the answer to your problem when you change back to quality fuel and it runs right. As a point of interest most small engines will not run right on e fuel mixes.

Mar 31, 2014 | Ford Ranger Cars & Trucks

1 Answer

Po171 po174 code


Lean bank 1 and bank 2 , and throttle actuator system fault. Check reason for lean codes 1st, vacuum leak(s), air inlet boot and hoses, or low fuel pressure / clogged filter. Repair as needed then clear codes and recheck .

Jan 09, 2014 | Cars & Trucks

1 Answer

Check engine light is on codes are po171 system too lean (bank 1) po174 system too lean (bank 2) so what can i do


Look for vacuum leaks,that are causing the O2 Sensors to go lean, and set codes on both banks

Nov 11, 2010 | 1997 Ford Expedition

1 Answer

Generic code PO171 system 2 lean bank 1 generic


This can be caused by a faulty mass air flow sensor

Jul 06, 2010 | 1999 Ford Taurus

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

3 Answers

1995 Windstar OBD II showing codes PO340, PO171, and PO174.


Symptoms of a faulty Camshaft Position Sensor can include hard starting (or no starting), rough running/misfiring and/or loss of power.

Code 340 COULD be caused solely by a faulty Camshaft Position Sensor. However, this code refers to the entire circuit. So, replacing the sensor may not fix the issue. The problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM.

Codes 171 and 174 typically appear together. They are caused by the 02 sensors reading too much air (lean) in the exhaust. In most cases, simply cleaning the MAF sensor does the trick. I typically take it off and spray it with electronics or brake cleaner. Just make sure it dries before reinstalling. If this doesn't eliminate the codes, inspect all vacuum and PCV hoses, check for a dirty fuel filter and ensure the furl pressure is within limits.

For clarification, the first trip to the shop your car showed codes 402, 732, 733, 171 and 174. After changing the DPFE/EGR, did ALL those codes go away and now only codes 340, 171 and 174 exist? Or do you have the second set of codes in addition to the first codes?




Jan 15, 2009 | 2001 Ford Windstar

1 Answer

1995 Windstar OBD II showing codes PO340, PO171, and PO174


Hello;
With those codes, the first place I would check is the fuel pressure. Also check the fuel filter and replace it if you haven't already. Then clear codes and recheck. Even if your fuel pressure is with in range it still may not push enough fuel to operate your vehicle.

Jan 15, 2009 | 1995 Ford Windstar

2 Answers

What is PO171 on Ford Winstar 97 3.8 liter


That's an 02/oxygen sensor code means that bank 1 or 2 is too lean. Good Luck contact if you need more help.

Dec 29, 2008 | 1998 Ford Windstar

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