Check Engine Light and Scan result

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  #1  
Old 06-13-05, 06:12 PM
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Check Engine Light and Scan result

Car: 1999 Explorer 6 cyl 4.0L. VIN 1FMZU...
OBD2 code: P0 136

This I understand is the oxygen sensor. Is it the one before or after the catalytic convertor? And can I install it?

I checked prices and found they are $60-70. I went to a local garage and the mechanic told me he doesn't install aftermarket parts and that the part would cost $115. I wonder if he is lying as he posts a sign saying that they charge extra to install customers' own parts, and I cannot find an oxygen sensor anywhere for more than $75 for this model.
 
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Old 06-13-05, 07:37 PM
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Your vehicle likely has three or four oxygen sensors. The code probably refers to one of the front two, since the rears only monitor the functioning of the catalytic converter. Depending on the location, they can be fairly easy to change, although they are often siezed. If you can get at it, it is worth a try. The problem is you don't know which one it is. They are likely the same part, so I guess you could gamble and see if the light goes out. Better yet, go back to the mechanic and ask him exactly which one it is. This info should be part of the diagnostic he did.
 
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Old 06-14-05, 10:03 AM
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sCAN

I received the scancode at auto zone, but they couldn't tell if it was the one in front of the CC or in back.
 
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Old 06-16-05, 06:54 PM
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The code itself may not tell you but the data on the scanner will, which the tech could have looked at during the test. There are two sensors in front of the convertor, one for each exhaust manifold. Short of going back to the shop and asking them specifically, the only way to figure it out is to monitor each of the sensors in turn with a volt meter. A good sensor flips between approx. 0.100 and 0.900 volts (back and forth, back and forth) while the engine is running. A bad one has a more limited range or doesn't move at all. The sensors behind the converter take some time to warm up before they will show anything.
 
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Old 02-27-07, 12:44 PM
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Originally Posted by dgabriel View Post
Car: 1999 Explorer 6 cyl 4.0L. VIN 1FMZU...
OBD2 code: P0 136

This I understand is the oxygen sensor. Is it the one before or after the catalytic convertor? And can I install it?

I checked prices and found they are $60-70. I went to a local garage and the mechanic told me he doesn't install aftermarket parts and that the part would cost $115. I wonder if he is lying as he posts a sign saying that they charge extra to install customers' own parts, and I cannot find an oxygen sensor anywhere for more than $75 for this model.
The scan tool I use will tell me the code but will also say if it is bank1 meaning the first one or bank2 which is the second one
 
  #6  
Old 02-27-07, 02:28 PM
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And just a thought, but I would avoid the mechanic who claimed to not use "aftermarket" parts. Nothing wrong with using, for instance, a Bosch O2 sensor. Sounds like a ploy to run the price up to me.

My $.02 worth.
 
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