Oxygen sensor replacement?

Tiny
JOE1953
  • MEMBER
  • 1999 FORD F-150
  • 5.4L
  • V8
  • RWD
  • AUTOMATIC
  • 200,000 MILES
Had two downstream oxygen sensor replace in the upstream exaust do it make any different wheather it been replace in the upstream exaust?
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Friday, February 20th, 2015 AT 11:05 PM

49 Replies

Tiny
MHPAUTOS
  • EXPERT
The do different jobs, they do look the same but they are not interchangeable. Here is a guide to help you change them out with instructions in the diagrams below for your car.

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

Check out the diagrams (Below). Please let us know what happens.
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Saturday, February 21st, 2015 AT 1:54 AM
Tiny
JOE1953
  • MEMBER
So I need to remove the oxygen to the the right place are that what you saying?
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Saturday, February 21st, 2015 AT 9:13 AM
Tiny
MHPAUTOS
  • EXPERT
The up stream and down stream o2 sensors are not interchangeable, if you have replaced one because of failure you do not have to change the other at the same time, if it is working, do not touch it. You just can't put them in front to back positions that's all.
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Saturday, February 21st, 2015 AT 2:10 PM
Tiny
EDWRD67
  • MEMBER
  • 1999 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
How to put on o2 sesnsor on a 1999 ford truck
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Thursday, September 10th, 2020 AT 6:37 PM (Merged)
Tiny
CJ MEDEVAC
  • EXPERT
See my profile. They screw in just like a spark plug.

However they have a wire to contend with, so they make a O2 tool, basically a spark plug socket with a cut-out down the side, for the wire to protrude out.

For hard to get to spots, other specialty sockets are available. Sometimes you can do it with a wrench or channel lock pliers.

Since I know little about your rig, I do not know how many you have and their locations. They are usually on the mandifold or exaust. Close to the engine. Or. Around the catylitic converter A manual would be a good investment.

When you purchase the O2, the part store guys are good about FREE CODING and which one. And where.

Please send back your results.

Love, Turddog
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Thursday, September 10th, 2020 AT 6:37 PM (Merged)
Tiny
DANNY
  • MEMBER
  • 1998 FORD F-150
Engine Mechanical problem
1998 Ford F150 V8 Four Wheel Drive Automatic

getting a diagnostic of both oxygen sensors on drivers side changed them an reset the codes still the same thing were should I start troubleshootin
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Thursday, September 10th, 2020 AT 6:37 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
What codes did you get? P0171 or 174? If so check for vacuum leaks, and fuel pressure.
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
You can rent the test gauge at Autozone.
Get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!


https://www.2carpros.com/forum/automotive_pictures/62217_CRC_Throttle_Body_7.jpg

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Thursday, September 10th, 2020 AT 6:37 PM (Merged)
Tiny
DAGO MACKLIN
  • MEMBER
  • 1998 FORD F-150
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Just replaced both heated o2 sensors on it an still get codes P0135 and P0155. Is it possible to buy bad o2 sensors?
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

In the diagrams down below I have included a diagnostic troubleshooting flowchart from the vehicle manufacturer for both Direct Trouble Code (DTC)(s) P0135 and P0155. These flowcharts will lead you to the exact cause of the DTC(s) so you can get it fixed, and fixed right the first time.
Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
DAGO MACKLIN
  • MEMBER
Is it possible that a bad PMC relay would cause codes P0135 and P0155?
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

It's possible, but extremely unlikely. The troubleshooting guide that was sent to you earlier is what the technicians at a dealership would use to diagnose your vehicle for these DTC's. I would follow the guide and you should find the cause.

Thanks,
Alex
2CarPros
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
KEN
  • ADMIN
If I can jump in here, those codes are for the O2 heaters. I would check the heater wiring and ground and if okay replace the PCM. Here is a guide and the engine wiring diagrams to help confirm the failure. We had this problem on a 2005 Crown Victoria and it was the PCM.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
COLUMBUS2382
  • MEMBER
  • 1998 FORD F-150
I have a ford f150 1998 I was wondering if the oxygen sensors make it sputter like it wants to stall when your in drive and sitting at a light or in traffic. It runs fine when it is in nuetral or park it only happenes when your sittin in drive. Thanks for help.
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Yes they could among many other things. If the o2 is faulty and detects a high fuel mixture but its actually normal and it turns down the fuel mixture it would run to lean causing that problem.

Easiest way to find out is to scan for trouble codes.
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Thursday, September 10th, 2020 AT 6:38 PM (Merged)
Tiny
SCOF150
  • MEMBER
  • 1997 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 130,000 MILES
I was getting heater and circuit malfunctions for the O2 sensors. I then replaced all the sensors cleared the codes and the codes were back again after two trps in the truck. Any idea what could be going on?
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Did you check wiring, plugs. Many times, due to the heat, the wiring to the O2 sensors gets damaged.

Let me know. Also, let me know the code you get.
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)
Tiny
SCOF150
  • MEMBER
Wiring seems ok its hard to tell because the drivers side O2 sensor plug is in a tight sport. The codes are 136 and 141. I get two codes 136 and 141 then two more with the same number that say pending. When I replaced the sensor it looked like it had overheated half of the sensor was white and inside it looked cracked.
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you replaced them more than once?
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)
Tiny
SCOF150
  • MEMBER
No this is the first time
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I wonder if you got a bad one that shorted.
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Thursday, September 10th, 2020 AT 6:39 PM (Merged)

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