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Old 12-11-2012, 09:42 AM   #1 (permalink)
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Default O2 Sensor issues?

I recently replaced my MAF, entire catalytic converter y pipe, and put in 4 new bosch premium O2 Sensors. The truck is running better than ever (at least since I bought it) but now the infamous SES light has returned and I'm getting the following codes: P0161, P1175, P1172. Any help would be greatly appreciated.
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Old 12-11-2012, 10:46 AM   #2 (permalink)
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Bank 2 sensor 2 has a bad heater circuit and both banks are running lean which does not make a lot of sense since you replace all those parts,
Curious, why did you throw all those parts at it before and what codes did you have then?
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Old 12-11-2012, 11:37 AM   #3 (permalink)
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i don't buy Bosch sensors anymore..
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Old 12-11-2012, 03:45 PM   #4 (permalink)
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Well The MAF sensor had gone bad and was causing the engine to stall at stops and low RPMs. After unsuccessful attempts to fix it by cleaning it I just went ahead and replaced it. The Y pipe was changed out with both catalytics because mine had gone bad and I managed to pick some up off a disco being sold for parts at quite a bargain (student budget). The O2 sensors were completely fried and considering my terrible mileage I just went ahead and swapped those out.
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