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Old 07-13-2011, 09:11 PM
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Default DTC P0140...help

So my truck is throwing a P0140 code...as far as I can tell that is something to do with my rear o2 sensor...can anyone help me with this?
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Old 07-13-2011, 10:48 PM
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1/2 O2S Stays At Center. Just copy and paste that and search it. Youd probably get the most results that way.
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Old 07-13-2011, 11:08 PM
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search on google? bank 1 sensor 2 no activity-thats what the internet says the problem is..I have no idea how to fix that however..
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Old 07-14-2011, 07:00 PM
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This link might help.
http://www.obd-codes.com/p0140
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Old 07-14-2011, 07:32 PM
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An O2 sensor has quit working, the connection may be loose or the wiring has shorted. You have 4 in the system.
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Old 07-14-2011, 08:42 PM
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There are two O2 sensors for each manifold one upstream of the catalytic convertor and one downstream. They do wear out. I'd Just replace the O2 sensor and be done with it. Bank 1 is usually on the left side and sensor 2 is usually the downstream one. If you have one bad the other downstream one should also be changed because it won't be long before it fails as well. I had this same problem on an 03 Intrepid. Replaced both downstream sensors and that fixed her up. There is a chance that you could have a loose connector or another electrical problem however if you have high milage it is more than likely the sensor itself. Good luck and keep us posted.
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