O2 Sensors

the O2 sensor can be read using live data feed, if it is not working with in the required voltage it should be replaced. failed o2 sensors will increase fuel economy. Here is how you can change the sensors and their location as well in the diagrams below but check out this guide first

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

and

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

Please run down these guides and report back. The secondary sensors are thein the catalytic converters. Check out the diagrams (Below). Please let us know what happens.

Sensor was already replaced. Mileage went down afterwards.

They will have to make sure it is working it can
Be checked with live data feed

OK thanks

How many O2 sensors on the truck listed above STX model, regular cab?

Hello, I'm Danny.

It's showing four sensors in total. Two are pre-catalytic converter and the other two are mounted in the converters. I've attached a picture below. Here is a tutorial showing how to replace Ho2 sensors:

https://www.2carpros.com/articles/how-an-oxygen-sensor-works

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Hope this helps and thanks for using 2CarPros.
Danny-

Where is the location of the heated oxygen sensor Bank 1 Sensor 1. Is it on the drivers or passenger side of my 2006 F150 5.4l v8?

Here is a guide to help you see what you are in for when changing the sensors out and the location of the sensors in your truck below.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

I have a 2004 Ford F-150, 4.6. It’s reading codes 2195 and 2197 which are O-2 sensor codes. I’ve replaced both #1 O-2 sensors, the MAF sensor, the fuel filter and all suspect Vacuum hoses. I’ve also checked for Vacuum leaks, cleaned the ICV and EGR valve. The fuel pressure is 38 (should be between 30 and 40). Checked the temp. in front of and behind the Catalytic Converter ( under 100 degrees difference). I’ve invested a lot of money in parts that have not resolved the problem. Can I check the ICV by connecting it to a battery and see if *** is fully opening? I’ve checked the ohms (reading 10.1 – 2prong). I could sure use some help ! Thanks

so there's no performance problem only the codes wont go away? you did erase them after parts change?

I'm sorry I should have said The truck is ideling worse then before. When it's first started it will idel fast then very rough at around 1000 rpms then die.

could be vacuum leak check All the hoses, check for cracks in the intake manifold, bolts loose, gasket sucked in, air entering the exhaust ahead of the OX sensors is all detected by the OX sensors and try to richen up fuel injected but can only go so far in corrections..
This goes to the point the motor runs rough from leaness in and not enough fuel to counter the leaness.
There are different procedures to use for leak detection. Some use propane, some use smoke, some use a scanner to watch certain sensor reactions to forced test procedures.

I've sprayed carb cleaner all around the intake and presure checked the elbow at the PCV. I've ordered a new PCV and will try that tonight. (nobody had on in stock). I think I,ve done a good job of checking for a vacuum leak but I'll try again.

Any other ideas?

Thanks.

I have a 2004 F150 with 52000 miles and just recently the engine light came on, i took it to a shop and had them hook it up to a computer and it said it was my oxygen sensors. I decided to take it to the shop, before i could get it there the light came off. I decided to not ake it to the shop but a month or so later it came back on. I made a appointment with Ford which i had to wait a month for, before the time of the appointment it came back off again. Finally the day came i went to my appointment and of course waited 5 hours just for them to tell me that it was my Thermostat stuck open. I told them i had it looked prior to my appointment and the computer said it was my O2 sensors. I'm not completely dumb when it comes to working on vehicles but I've never heard of a Thermostat stuck open could cause a vehicle to run rich which would make the computer put out a code for the o2 sensors. Just the other day after they had replaced the Thermostat the light came back on again for the same o2 sensors???>??? Is it possible for a vehicle to run rich because of a Thermostat stuck open??

Yes it is totally possible as the truck will run cooler and as if it was cold and would give the engine extra fuel in order to compensate. So when you hook it up to a scanner again dont take there word for what is wrong. Get the code itself then have them clear it and get the code to me or one of us and we can look it up and tell you what that code means and what may be wrong. Do you remember what the code was?

the code is P0420. I've looked it up and read about this code. My truck only has 52000 miles and the cat is going bad already?? That is just ridiculous. I do have a extended warranty but i'm sure it doesn't cover cats, however...does anyone know if it should still be covered through ford since it has so little miles on it? I have a appointment for my truck here in a couple days, but it's not at Ford cause i waited so long there just to get a Thermostat changed. I'm also going on a 3000 mile drive here in a couple weeks, i was told that it just might need to be driven for a long while since maybe the cat isn't getting hot enough, but i don't want to risk breaking down on the road. Would it hurt my truck if the cat is doing what it is doing and i still drive the mileage?

Electrical problem
2004 Ford F150 V8 Two Wheel Drive Automatic

how long can you drive your truck with the O2 sencer bad?

Actually, based on how bad it is will make a difference. The performance and efficiency will decline. Also, it can cause problems to other parts such as the catylatic converter if it is running too rich. If you can, I would recommend replacement. It is easy to do and the part should be around 75 bucks.

Let me know if you have other questions.
Joe

my truck start to shake real bad when i was driving down the road and my oxygen censors are going bad and my dad said that it was missing. would my oxygen sensors be causeing it to do that? are what could it be?

If have check engine light on have to check for codes
if check engine light on and blink as you drive engine is misfiring and need to check it for tune up and make sure its firing at all cylinders
have to have the engine running on all cylinders 1st

2003 F150 4.6l V8 - How many and where are the O2 sensor located. If my engine light came on do I need to change both of them? I got codes 0171 & 0174 when it was tested.

No, that is not bad sensors causing that problem. It is your engine running too lean for some reason and that's what you need to find. Look at fuel pressure, vacuum leaks, MAF and other things that effect fuel pressure.

Check engine light came on after installing a new upper intake manifold new gaskets etc. Scan code said burning lean at bank one. My guess is the oxygen sensors need to be replaced so how many sensors are their and where are they located? I am thinking it is four. Two upper and two lower and I would like to replace all 4! How can I order the parts for my truck. Thanks!

there are four, but re-scan as it should say which one it is probably the one before converter though. make sure not air or vacuum leaks though as the manifold may still be leaking vacuum.

Especially as the intake was just replaced and then the light came on. I have seen new ones out of the box that were warped enough they did not seal.

I got the P0141 code so I changed out the Bank 1, Sensor 2 O2 sensor. After about 30 minutes of drive time, the check engine light came on with the same P0141 code. Got another O2 sensor and changed it out withthe same result. Disconnected the battery both times prior to chaging out the sensor as instructed by the auto parts dealer. Is there something else that can cause the P0141 code that I should check?

A code P0141 may mean that one or more of the following has happened:

•open or short to ground in the wiring harness
•O2 heater circuit wiring high resistance
•O2 heater element resistance is high
•Internal short or open in the heater element

Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.

Possible Solutions
•Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
•Repair short or open or high resistance in wiring harness or harness connectors