Oxygen sensor locations

Tiny
JENNA SMITH
  • MEMBER
  • 2011 FORD EDGE
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
Replacing all four o2 sensors but not sure of their locations for our specific model. Any suggestions?
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Friday, November 16th, 2018 AT 9:08 PM

7 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning.

Why are you replacing all the sensors? Rarely do all fail at once.

What is your specific issue that makes you think they are all bad?

I have pictures of the upstream. The down streams are under the car by the catalytic converters.

Roy

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

https://www.2carpros.com/articles/how-an-oxygen-sensor-works
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Saturday, November 17th, 2018 AT 5:32 AM
Tiny
JENNA SMITH
  • MEMBER
Two of the four are showing as needing replaced. We are going on a very long trip in December and my husband figured replacing them all would not be a bad thing.
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Saturday, November 17th, 2018 AT 11:00 PM
Tiny
ASEMASTER6371
  • EXPERT
It is highly unlikely that they show they are bad.

Can you give me the codes that he had so I can help confirm this before you spend all this money?

Roy
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Sunday, November 18th, 2018 AT 4:46 AM
Tiny
JENNA SMITH
  • MEMBER
Here is what they said. We can totally send back the sensors that we do not need if you think we should not waste the time or money on the others.
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Sunday, November 18th, 2018 AT 12:43 PM
Tiny
ASEMASTER6371
  • EXPERT
There are checks to be done as the sensors may be working but seeing bad information.

Below are the possibilities for all the codes. All these items need to be checked to be sure of the reason for the codes.

The odds of having four sensors fail at the same time is like you getting hit by lightning two times in one day.

Roy

P2196
Descriptor
O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1
Probable Causes
Air Leaks After Mass Air Flow (MAF) Sensor
Camshaft Timing
Corrosion
Cylinder Compression Incorrect
Diaphragm or Exhaust Gas Recirculation (EGR) Vacuum Regulator Leaking
Engine Oil Dipstick Seated Incorrectly
Evaporative Emissions (EVAP) System Purge Valve Stuck Open
Exhaust Gas Recirculation (EGR) Valve Malfunction
Exhaust Leaks Before or Near Heated Oxygen Sensor (HO2S)
Gasket Leaking
Harness Connections Incorrect
Harness or Heated Oxygen Sensor (HO2S) Short to Voltage
Heated Oxygen Sensor (HO2S)
Heated Oxygen Sensor (HO2S) Circuit Open
Oil Overfull
Positive Crankcase Ventilation (PCV) System Leaking or Valve Stuck Open
Powertrain Control Module (PCM) Damaged
Universal Oxygen Sensor Pumping Current (UO2SPC) Circuit Open
Vacuum Leak
Water in Harness Connector
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Sunday, November 18th, 2018 AT 2:21 PM
Tiny
JENNA SMITH
  • MEMBER
This actually popped up tonight.
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Sunday, November 18th, 2018 AT 7:06 PM
Tiny
ASEMASTER6371
  • EXPERT
That code is for the stability control and has no connection to your current issue.

We can address that but you need to start a new question for that.

Roy
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Monday, November 19th, 2018 AT 2:45 AM

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