Code P0136, 02 sensor location needed

Tiny
IGENIUS92
  • MEMBER
  • 2000 FORD EXPLORER
  • 4.0L
  • 6 CYL
  • AUTOMATIC
  • 205,000 MILES
Hello, I have the SUV listed above vy 4.0 ohv efi engine. The other day my check engine light came on giving a p0136 code, stating 02 sensor malfunction bank 1 sensor 2. Does anyone know where this one is located? Any diagrams? How many 02 sensors does this SUV? I have only seen three, is this accurate? Is bank 1 sensor 2 considered up stream or down stream? Does anyone know the part or model number so I can order the correct one? Thank you!
Thursday, September 13th, 2018 AT 9:05 AM

37 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

You have three sensors in your system.

The code is for bank one sensor 2. It is a downstream sensor. It is the only downstream sensor. You can get it at any parts store.

You will need either a O2 sensor socket or a 7/8 open end wrench to replace the sensor.

Roy

136

P0136
Descriptor
Ho2S Sensor Circuit Malfunction (Ho2S-12)
Probable Causes
Exhaust Leaks
Sensor Contaminated or Damaged
Sensor Wires Crossed
Wiring and Pins Pinched, Shorted, or Corroded
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Thursday, September 13th, 2018 AT 10:53 AM
Tiny
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Great! Thanks for the helpful information!
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Thursday, September 13th, 2018 AT 11:08 AM
Tiny
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You are welcome.

Always glad to help.

Roy
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Thursday, September 13th, 2018 AT 12:05 PM
Tiny
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Oh, one more question. So if I change one 02 sensor should I just change them all?
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Thursday, September 13th, 2018 AT 12:26 PM
Tiny
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Nope just the one that has an issue.

Roy
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Thursday, September 13th, 2018 AT 12:29 PM
Tiny
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Great thanks again!
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Thursday, September 13th, 2018 AT 12:40 PM
Tiny
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You are welcome.

Roy
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Thursday, September 13th, 2018 AT 1:00 PM
Tiny
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Okay great thanks. Update: I got the O2 sensor it is a Bosch about $50.00 from AutoZone put a fuel treatment in put $15.00 in and drove it about forty miles so the ECM would reset and I took a picture of the ob2 data seems the ob2 and EVAP has an X on both what does two "X'" mean? I am trying to get it ready for smog.
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Thursday, October 4th, 2018 AT 10:40 AM
Tiny
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Okay, that means those monitors have not set. They should have check marks next to them when they are complete. When that happens, you can get it smoged.

Drive cycle for setting is below.

Roy
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Thursday, October 4th, 2018 AT 10:47 AM
Tiny
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Oh okay, but the picture you sent is very blurry I cannot read it.
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Thursday, October 4th, 2018 AT 10:51 AM
Tiny
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I enlarged and split them up.

You could also download to your computer and enlarge it as well.

Roy
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Thursday, October 4th, 2018 AT 11:52 AM
Tiny
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Thank you very much!
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Thursday, October 4th, 2018 AT 11:57 AM
Tiny
ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
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Thursday, October 4th, 2018 AT 11:58 AM
Tiny
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So now after doing all that my check engine light came on again with a different code. Now it is a p0420 code. What does it mean and what should I do now?
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Friday, October 5th, 2018 AT 9:37 AM
Tiny
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Okay, that is a code for the catalytic converter. You need to replace the catalytic converter.

Roy
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Friday, October 5th, 2018 AT 9:40 AM
Tiny
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I was afraid of that. Which one do you recommend from Rock Auto? Is a VIN needed to properly find the correct one for my SUV? Is there a diagram and or pictures of where the catalytic converter that needs replacing is? How many catalytic converters exactly are on my SUV? Could a universal eBay catalytic converter be used to put on for it to pass smog?
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Friday, October 5th, 2018 AT 10:06 AM
Tiny
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Do not use a universal catalytic converter it will not work.

Call them and they will ask you for your information to be sure you get the correct one.

I suggest getting a Walker.

Roy
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Friday, October 5th, 2018 AT 10:14 AM
Tiny
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Okay, thanks.
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Friday, October 5th, 2018 AT 11:09 AM
Tiny
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You are welcome, keep us updated.

Roy
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Friday, October 5th, 2018 AT 11:10 AM
Tiny
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Sure will. Where is the catalytic converter I need to replace located? Is the a diagram or pictures?
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Friday, October 5th, 2018 AT 11:12 AM

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