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  #1  
Old 08-21-2007, 11:40 AM
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o2 Sensor (Bank 1, Sensor 2)

Hey Guys,

I had my SES light go on Friday Afternoon. I scanned it and it read o2 Sensor Malfunction (Bank 1, Sensor 2). The guys at the AutoZone told me that this sensor is on the passenger side of the truck and is located on the exhaust pipes. I checked under the truck and found 1 on the driver side 1 on the passenger side and one by the Cat System. So i am guessing I have 3 02 sensor on my 1999 V10. I bought the replacement sensor and installed it myself. I cleared the codes after installation and just last night it came on again. I scanned it again, and it read the same problem o2 Sensor Malfunction (Bank 1, Sensor 2). I erased the code and the SES light shut off. For a few hours I thought the problem was fixed. I went to my girlfriends house late last night for some hanky panky and the darn SES light went on again. The truck runs o.k, I know it is running lean because that's what the PCM tells it to do when there is a faulty o2 sensor. Is it possible that AutoZone sold me a dud of a sensor. Fred/Art, I need your help quick guys. I appreicate a quick reponse. I hate seeing the SES light on my instrument cluster it's annoying.

Thanks,

Frank
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Old 08-21-2007, 02:57 PM
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Please let us know what the exact code is, PXXXX.
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Old 08-21-2007, 03:09 PM
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Quote:
Originally Posted by rlh68050
Please let us know what the exact code is, PXXXX.
P0136 - o2 Sensor Malfunction (Bank 1, Sensor 2) I changed the o2 sensor on the passenger side as I only found three o2 sensor.
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Old 08-21-2007, 04:18 PM
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Sensor 2? That's the one after the catalytic converter.

On a single-cat vehicle, the one after the cat should be called Bank 1 Sensor 2.

Check the wiring first.
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Old 08-21-2007, 05:35 PM
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Quote:
Originally Posted by krewat
Sensor 2? That's the one after the catalytic converter.

On a single-cat vehicle, the one after the cat should be called Bank 1 Sensor 2.

Check the wiring first.
Hey Art,

Thanks for the quick response. I was told by AutoZone but we all know how credible they are that it was located on the passenger side of the motor. They even showed me a diagram that had like 5 or 6 other sensors, but the diagram was not for my V10 it was for a V8. I know for a fact I have only three. Art, are you positive that on my 1999 V10 Bank 1, Sensor 2 is the one after the cat. Also, will i be able to use the same o2 sensor that I purchased from AutoZone. Please let me know. Thanks bud.
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Old 08-21-2007, 05:54 PM
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Bank 1 is right side (passenger).

Sensor 1 is the one right at the motor.

Sensor 2 is the one AFTER the catalytic converter.

On a single-cat vehicle, the one after the cat is Bank 1 sensor 2.

Just looked it up before somewhere w/Google.

Here's a thread from FTE:

http://www.ford-trucks.com/forums/617458-o2-sensor.html
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Old 08-21-2007, 06:14 PM
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Quote:
Originally Posted by krewat
Bank 1 is right side (passenger).

Sensor 1 is the one right at the motor.

Sensor 2 is the one AFTER the catalytic converter.

On a single-cat vehicle, the one after the cat is Bank 1 sensor 2.

Just looked it up before somewhere w/Google.

Here's a thread from FTE:

http://www.ford-trucks.com/forums/617458-o2-sensor.html
Art,

So bank 2, sensor 1 will be the o2 sensor on the driver side. Please confirm. Your a genius. Thanks
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Old 08-21-2007, 07:33 PM
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bank 1 is the always the same side of the motor where #1 cylinder..
In this case bank 1 is pass side and bank two means drivers side..

sensor 1 is always before the converter and sensor 2 is always after the cat.

you can have bank 1 or bank 2 and then sensor 1 or 2
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Old 08-21-2007, 10:22 PM
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Quote:
Originally Posted by fomocofan
you can have bank 1 or bank 2 and then sensor 1 or 2
Exactly... and again, on a single catalytic converter vehicle, Bank 1 Sensor 2 is the one AFTER the catalytic converter.

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Old 08-22-2007, 12:20 AM
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Quote:
Originally Posted by krewat
Exactly... and again, on a single catalytic converter vehicle, Bank 1 Sensor 2 is the one AFTER the catalytic converter.

I bought a new o2 sensor, but as i was coming home tonight the SES light turned off. Oddly enough, i got a better throttle response. This seems wierd. Do you think the problem still exist. I will most likely wait for it to throw a code again. But thanks to you guys I know what's up, i know i sound kind of hard headed but thanks anyways.
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Old 08-22-2007, 09:30 AM
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Years ago I fussed with JUST replacing the suspected bad O2 sensor... seemed to always still give me grief

Once I gained a good understanding on how the sensor worked, the tight calibrations of them, and how the computer used the info I decided that once one proved to be bad (Usually between 45 to 80K miles) It was time for a new SET of sensors.....

I know this is an more expensive method but it has served me well over the last 30+ years of computer controlled motors..... I am also eternally grateful that this is a part the aftermarket stepped up to the plate and made....

Early O2 sensors on one of my low tech 1975 Nissan motors were in the $159.00 range and I needed 2 of them...arrrrgh! Same part in a auto store today is under $60 bucks.... much easier to swallow
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Old 08-22-2007, 03:48 PM
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Fred,

Do you know why my SES light turned off. All of a sudden the code is gone. What gives?
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Old 08-22-2007, 04:07 PM
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You replaced the wrong sensor. Pay attention to the previous posts. You replaced bank 1 sensor 1. Sensor 2 is after the cat. Bank 2 sensor 1 is on the driver side. I just had to do this same repair last month.
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Old 08-22-2007, 04:19 PM
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I forget the number, but a certain number of cold starts with no errors will clear the code and the light.
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Old 08-22-2007, 05:03 PM
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Quote:
Originally Posted by tlcarrig
You replaced the wrong sensor. Pay attention to the previous posts. You replaced bank 1 sensor 1. Sensor 2 is after the cat. Bank 2 sensor 1 is on the driver side. I just had to do this same repair last month.
Oddly enough when I was going to install the correct sensor the SES shut off. I'll just wait till it throws a code.
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Last edited by V10_Cougar; 08-22-2007 at 05:08 PM.
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Old 08-22-2007, 05:03 PM
 
 
 
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