Question about 1998 Ford Windstar

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My 1998 ford winstar is showing check engine light and the code is p0171 what that means

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Check for a small hole in the right angle rubber hoses between the PCV valve and the motor. A hold in the hoses will give a false alarm indicating "lean bank1" and "lean bank2" on Fords and Lincolns and once you replace those faulty hoses or at least tape them up you can reset the codes at the parts store and it should not come back until you have holes in the hoses again. you can also keep driving the car and after numerous "successful trips" with no more codes, the engine light will eventually go off if you have corrected the problem.

Posted on Aug 03, 2010

  • Eric S
    Eric S Oct 03, 2010

    My van was showing P0171 and P0174 codes and I was getting ready to change the isolator bolts as described in TSB 03-16-1 as that sounded like my symptoms. I read your tip and check the two rubber elbows connecting the pcv lines on the valve covers to the plastic lines connecting to the air intake. The left front most cover elbow was good but the hard to see right rear-most elbow was the consistency of chewing gum and had a hole in it. I replaced the rear elbow and reset the OBDII codes and the P0171 and P0174 codes have not returned. Your tip has saved me $$$ and frustration, thank you!
    plansea

  • Eric S
    Eric S Oct 03, 2010

    The rear PCV valve cover hose is the likely culprit on the 1998 Ford Windstar 3.9L as this line connects to the intake manifold after the Mass Air Flow sensor. Three days now and no P0171 and P0174 codes.

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This problem is caused by defective O2 sensors in both bank one and bank two of the engine, these are the sensors before the catalytic converter, you must replace them from under the van, be very careful to route the wiring to them just as it was or you will end up with burnt wiring and another fault code

Posted on Aug 02, 2010

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I got a diagnostic test on my car cause my check engine light is on and it is shaking real bad when driving it and when i stop at a red light it seems like it wants to stall out


P0305 is a # 5 cylinder misfire , do you know what that is ? Check engine light flashing indicates a severe misfire that can damage the catalytic converter . Don't drive this vehicle ,take it immediately to a qualified repair shop or the dealer .
A Ford P0171 is a LEAN code for cylinder bank 1, and P0174 is a LEAN code for cylinder bank 2. These codes commonly occur on many Ford vehicles, and are set when the powertrain control module (PCM) sees the air/fuel mixture is running too lean (too much air, not enough fuel).

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I have a 2003 ford winstar and the check engine light is on. The code readings say Bank 1 and bank 2 is lean. What does that mean?


It means both O2 Sensors, are reporting a lean
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Now you need to figure out why--vacuum leak etc.

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Showing check engine - then the code reader is p1133 and p0171


miles...?
P1135 Air-Fuel Sensor Heater Circuit Response.
the air fuel sensor malfunction is the main problem and thats causing the code p0171.
Hard to start o long cranking time to starter is gona be the first symtoms.
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Ford windstar check engine light comes on after stopping when starting to get moving again shows p0171 & p0174 codes why??


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks. P0174 OBD-II Trouble Code


Technical Description

System Too Lean (Bank 2)


What does that mean?

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

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Thanks.


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Even though your O2 sensor is showing good by your scan, it could be lazy in giving readings. It has less than a 10 second window to give the reading especially if it is a heated O2 sensor. Try a Bosch unit.

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1998 honda accord obd code P0171 and P0170.


Hi,welcome to fix ya.
p0171 is for a lean fuel condition .A variety of things can cause this code the most common one is a bad o2 sensor but a plugged injector,fuel filter or dirty egr system can cause this as well.

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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

2 Answers

98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+


po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Dec 15, 2008 | 2003 Ford E250

2 Answers

P0171 code, low power, hesitation during acceleration


When in doubt, with ALL Windstar "mystery engine/power train problems, make sure all of the GROUND STRAP connections are clean & tight. Especially the starter ground strap. Sounds silly, but if you've got intermittent "juice" the computer will go out of it's mind and you'll have all kinds of strange results! (See my solution under 1998 Windstar > "Surging while driving")

Aug 14, 2008 | 1998 Ford Windstar

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