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I have a 1998 ford explorer v6 4.0 L 4wd which loses power when i get it goin? Could it be the catalytic converter or the O2 sensor?

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1 Answer

The exhaust converter could be blocked

They only last 12 to 14 years

Posted on Jan 08, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
  • 76070 Answers

SOURCE: My 2002 Lancer's check engine

Aftermarket converters can cause catalytic converter monitor issues, these are not O2 sensors, they are catalytic converter efficiency monitors, I know they look like a O2 sensor but they are very different in how they work, what are the codes you are getting.

Posted on Nov 05, 2008

jeffk14
  • 16 Answers

SOURCE: 1998 FORD EXPLORER SOHC O2 SENSORS

HERE. They have the Ranger, Explorer & Mountaineer on the same page but if you read through it, it will give you an idea on where to look.

Posted on Nov 20, 2008

blueextc3221
  • 15935 Answers

SOURCE: o2 sensor location

DTC P0156 indicates the output voltage of the downstream Heated Oxygen Sensor (HO2S) is less than some calibratable functional window. The possible causes are:

  1. Pinched, shorted and/or corroded wiring and pins.
  2. Crossed sensor wires
  3. Exhaust leaks.
  4. Contaminated HO2S.
  5. Bad HO2S.
Since you didnt specify the engine size in your vehicle - please see the diagram below for the location of the sensor(s)

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Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Posted on Apr 16, 2009

  • 318 Answers

SOURCE: P0420 and P0430

The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.

Posted on Sep 25, 2009

BCAS1298
  • 3092 Answers

SOURCE: P2097 Error code in 2006 Dodge Grand Caravan, which O2 Sensor?

The one before the catalytic, on the side where cylinder # 1 is at. close to the exhaust mag.

Posted on Dec 28, 2009

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2 Answers

I have a 2004 ford explorer xlt v6 4.0l gas. need a o2 sensor diagram. I need names and description. for example bank 1 sensor 2 after catalytic converter


https://www.google.com/search?q=1998+BMW+318i+Automatic+Torque+settings+Head+gasket&biw=1360&bih=650&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwie8o3ix8_QAhUJRSYKHdIXBrkQsAQIKQ#tbm=isch&q=2004+ford+explorer+xlt+v6+engine+firing+order

Hope this helps

Bank two are the even cylinders. Follow exhaust manifold on the side. You will find an O2 sensor just after or on the manifold, before the catalytic converter. Then, look after the catalytic and you should find another O2 sensor, this is the one you mention in your post.

Nov 30, 2016 | 2004 Ford Explorer XLT

1 Answer

MAP sensor fail


O2 sensor check and catalytic converter check for contamination

Apr 15, 2014 | 1998 Ford Explorer

1 Answer

Where is the oxygen sensor on 06 ford explorer v6


Explorer requires 4 O2 sensors in total. Two are upstream, i.e. above the catalytic converter and two are downstream i.e. below catalytic converter. Simply locate these sensors by following the exhaust line from the engine towards the catalytic converter and after it.

Apr 14, 2013 | 1997 Mercury Cougar XR7

1 Answer

How many oxygen sensors are there on a 1996 ford explorer 8 cyl., 4.0 eng.


The answer depends on the type of exhaust system you have. You will have either 3 or 4 total O2 sensors on your V8. If you have single exhaust with a single catalytic converter then you will have 3 O2 sensors (2 upstream sensors & one downstream sensor - "up or down stream" meaning before of after the catalytic converter). If you have either dual exhaust and/or two catalytic converters then you have 4 O2 sensors (2 upstream & 2 downstream). If you have an MIL light (malfunction indicator light, or "check engine light") the code will indicate "front bank / bank one", which is one of the 2 upstream O2's before the catalytic converter(s), or "rear bank / bank two", which is one of the O2's after the catalytic converter(s).

Apr 22, 2012 | 1996 Ford Explorer

1 Answer

Cant locate o2 sensor on my 98 ford windstar


YOU HAVE 4 O2 SENSOR TWO O2 SENSOR LOCATED IN EACH EXHAUST PIPE AT THE INLET AND TWO O2 SENSOR ONE IN EACH IN CATALYTIC CONVERTERS.

Aug 09, 2010 | 1998 Ford Windstar

1 Answer

Where is the O2 sensor located?


There are total of four O2 sensors.

Two before the catalytic converter and two after the catalytic converter.

If you vehicle has over 160,000 miles or failing emission test then you should test the efficiency of the catalytic converters.

The exit temp should be few degree higher then the inlet temp.



Jul 14, 2010 | 1996 Ford Explorer

3 Answers

Code po430 not sure what maybe converter


One of three (3) possibitlies:
1. Catalytic Converter is malfunctioning.
2. O2 Sensor is malfunctioning. This will be the O2 Sensor located on the Catalytic Converter. However you should check and/or replace both sensors if needed.
3. You have an Exhaust Leak.
In Order of checking:
A. Check and Repair any Exhaust Leak.
B. Replace the O2 Sensor on the Catalytic Converter 1st. Also Known as the Downstream O2 Sensor or HO2 Sensor.
C. Replace the O2 on the Exhaust Manifold prior to the Catalytic Converter. Also Known as the Upstream O2 Sensor.
D. Replace the Catalytic Converter.
Let me know if this helped, or if you have any additional information, problems or questions. Feel free to contact me at FixYa.com!

Feb 01, 2010 | 1998 Ford Explorer

1 Answer

I have a 1998 ford explorer v6 sohc 4.0 l. check engine light came on. Put it on a computer and it says the o2 sensor is slow responding in bank 1 sensor 1. where is this located???


bank one is the passenger side bank of cylinders, the sensor is located in the exhaust pipe of that bank BEFORE the catalytic converter

Jan 25, 2010 | 1997 Ford Explorer AWD

1 Answer

Oxygen sensor for 1999 ford explorer


97 ane 97 have 4. I will assume that yours does too.

Go under Explorer.
Trace exhaust maniford from engine to catalytic converter.... in that path, you will find an O2 sensor (looks like a spark plug right in the exhaust pipe).

Same item on other side.

Now, sad part. You MAY find 2 more O2 sensors just after the converter!!

Autozone can usually do a free diagnostic on your vehicle and tell you which 1 or 2 sensors are bad.

Oct 24, 2009 | 1999 Ford Explorer

2 Answers

I need to change o2 sensor where is it located


Figuring that you have the 4.0 you have four o2 sensors. two up stream and two downstream. To know which one you need you really should hook up to a scanner and watch the information flow from each of them B1S1 and B1S2 will have an inverse proportion of voltage. That is to say if S1 is at .9mv, then S2 will be around .01 and visavera as it moves up and down in value. The same thing foes for bank two. The Si is located between the exhaust outlet of the engine and the catalytic converter. S2 is located after the last cat. converter. Many Fords have four cats.

Note; what the parts stores won't tell you is that you may have an O2 code not because you have a bad 02 sensor, but because the 02 sensor is sensing improper ratio's between the two sensors. This can be because the vehicle is running too rich, too lean or the cat. converters are not doing their job.

Hope this helps.

Aug 17, 2009 | 1998 Ford Explorer

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