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post #1 of 6 (permalink) Old 09-24-2006, 10:48 AM Thread Starter
 
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3.8L V6 Check Engine Light

1996 V6 3.8L T-Bird with 83K on the odometer. The check engine light is on and when the codes were accessed the following came up. P0156 and P0136.

1. Does anyone know what these indicate.
2. What may be the causes.

All my friendly mechanic wants to do is to change out the sensors, not diagnose the root cause. Any Ideas other than getting a new mechanic?
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post #2 of 6 (permalink) Old 09-24-2006, 12:24 PM
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Both those codes indicate that the rear 02 sensors have a circuit malfunction. This could because they are unplugged or the wiring in the transmission harness is unplugged/damaged. You should also check all fuses under the hood and inside the car to be sure.

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post #3 of 6 (permalink) Old 09-24-2006, 02:09 PM Thread Starter
 
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How accessable are the sensors, I have just moved back from Hawaii and some of my tools are still on loan to my ex son in law. (I doubt that I will see them again).

Many thanks for the quick reply.
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post #4 of 6 (permalink) Old 09-24-2006, 02:18 PM
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They're not too shrouded in there. They are under the car, one behind each of the 2 front catalytic converters, and the pipes go right along side the bottom of the transmission. It'd be a lot easier to get them out with the oxygen sensor tool. You can rent it at some auto parts stores.

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post #5 of 6 (permalink) Old 09-24-2006, 02:41 PM
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the rear o2 sensors are easy to get to if you have ramps, and I had to tighten one last week, and i used a wrench. just unplug it first so you don't break the wires as you are loosening them.
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post #6 of 6 (permalink) Old 09-24-2006, 08:15 PM Thread Starter
 
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many thanks to all of you for your quick responses. I will let you know how things work out.
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