O2 sensor failure upstream bank 1

2000 FORD MUSTANG
190,000 MILES • 3.8L • V6 • AUTOMATIC
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CHRIS KINARD
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Yes, i have replaced my 02 sensor bank 1, 3 times and about one hour after replacing it the obd2 would read that the 02 sensor was bad. can you tell me why please oh and also these are coming out pn the obd2 reader cat, evap, egr, ozs, htr.
Oct 7, 2019 at 6:50 AM
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ASEMASTER6371
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Good morning,

What is the code? Codes rarely identify bad parts. They only identify area of failure.

Once I know the code, I can further help.

Roy
Oct 7, 2019 at 8:52 AM
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CHRIS KINARD
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Po135.
Oct 7, 2019 at 10:34 AM
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ASEMASTER6371
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Below are the possibilities for the code. Most likely it is a wiring harness issue.

Check the red/yellow wire in the connector for power with the key on.

Roy

P0135
Descriptor
Ho2S Sensor Circuit Malfunction (Ho2S-11)
Probable Causes
Ground Circuit Open
Harness or Heated Oxygen Sensor (HO2S) Short to Ignition Switched Power (VPWR)
Heated Oxygen Sensor (HO2S) Heater Damaged
Ignition Switched Power (VPWR) Circuit Open
Low Battery Voltage
Poor Mating Terminals and Wiring or Corrosion
Powertrain Control Module (PCM) Damaged
Water in Harness Connector
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Oct 7, 2019 at 1:17 PM
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CHRIS KINARD
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Yes can you tell me what fuel sys 2 n/a means?
Oct 14, 2019 at 4:33 PM
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ASEMASTER6371
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Where do you see that?

roy
Oct 14, 2019 at 4:52 PM
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CHRIS KINARD
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On my obd2 scanner.
Oct 15, 2019 at 5:28 PM
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CHRIS KINARD
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And im taking my valve covers off do i need permatex on the valve cover groove and do i have to have a torque wrench???
Oct 15, 2019 at 7:32 PM
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CHRIS KINARD
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And what are the torque specs on the valve covers on the 3.8 v6 2000 Mustang? Please let me know. thanks
Oct 15, 2019 at 9:46 PM
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ASEMASTER6371
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No, replace the gasket and do not use any RTV.

The torque spec is 12 ft pounds.

Roy
Oct 16, 2019 at 10:57 AM
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CHRIS KINARD
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And do i need a torque wrench for the intake manifold and if so what are the specs?
Oct 16, 2019 at 11:40 AM
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ASEMASTER6371
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22 pounds on the intake.

Roy
Oct 16, 2019 at 11:49 AM
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CHRIS KINARD
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Thank you alot God bless you!!!
Oct 16, 2019 at 2:57 PM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Oct 16, 2019 at 3:15 PM
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CHRIS KINARD
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Hey, can i unplug the PCM the main computer and clean it? Let me know please.
Oct 27, 2019 at 8:13 AM
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CHRIS KINARD
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And i am getting this now:
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Oct 27, 2019 at 8:16 AM
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CHRIS KINARD
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And that. Let me know the details please. God bless.
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Oct 27, 2019 at 8:17 AM
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ASEMASTER6371
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What did you do to get this code?

This is for bank 1 sensor 2. It is the sensor on the driver's side down behind the converter.

Roy
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Oct 27, 2019 at 10:10 AM
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CHRIS KINARD
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Would it be okay for me to hollow out my catalytic converters?
Oct 27, 2019 at 5:51 PM
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ASEMASTER6371
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No, that is a federal violation and besides, you will set all kinds of codes.

Roy
Oct 27, 2019 at 7:29 PM
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CHRIS KINARD
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Okay, darn i didn't know that.
Oct 27, 2019 at 9:47 PM
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CHRIS KINARD
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I did get a gasket for the intake manifold and i torque it down to 18 should i go all the way to 22.
Oct 27, 2019 at 9:53 PM
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ASEMASTER6371
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Yes.

Roy
Oct 28, 2019 at 2:10 AM
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CHRIS KINARD
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Thanks a bunch.
Oct 28, 2019 at 2:23 AM
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CHRIS KINARD
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Hi, how many hangers do i have for my exhaust?
Nov 4, 2019 at 1:17 AM
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ASEMASTER6371
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3. I attached a picture.

Roy
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Nov 4, 2019 at 1:47 AM
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CHRIS KINARD
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Yes, can you tell me if i run my factory headers by themselves will it harm my engine?
Nov 9, 2019 at 4:21 PM
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ASEMASTER6371
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Factory headers. Please explain.

Roy
Nov 9, 2019 at 5:38 PM
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CHRIS KINARD
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Yes because i am waiting on the catalytic converters and exhaust.
Nov 9, 2019 at 5:45 PM
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ASEMASTER6371
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Okay, what are you planning for the exhaust?

Roy
Nov 10, 2019 at 4:30 AM
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CHRIS KINARD
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Are there specifically 02 sensors for upstream and down stream does it matter where i put them???? Thanks
Nov 16, 2019 at 5:12 PM
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ASEMASTER6371
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Yes, they are specific to there locations. When you get them ask for each one separately.

Roy
Nov 17, 2019 at 5:14 AM
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CHRIS KINARD
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Yes, can you tell me which 02 sensors go where OEM? i have a blue, white green and purple one. Please let me know.
Nov 17, 2019 at 2:24 PM
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CHRIS KINARD
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The people at these auto stores are newbies. so i rather get a professionals answer.
Nov 17, 2019 at 2:26 PM
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ASEMASTER6371
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Okay, I attached rock auto site. It has the location of the sensor and the numbers for you.

Roy
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Nov 17, 2019 at 2:34 PM
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CHRIS KINARD
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Heck ya! thank you a lot.
Nov 17, 2019 at 3:46 PM
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ASEMASTER6371
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You are welcome..

always glad to help.

Roy
Nov 17, 2019 at 3:52 PM