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Old 06-27-2013, 05:00 PM   #1
Join Date: May 2013
Vehicle: 1996 Mustang GT
Location: Kentucky
Posts: 11
Default P0172 system too rich bank 1 question

On my 96 4.6 gt I have gotten a P0172 a couple of times so I started doing some investigating and found that when the engine was running the bank 1 sensor 1 was running around 1% and the bank 1 sensor 2 was running around -100%. I was wondering if this is a downstream o2 sensor problem or something else. I have attached a screen shot of my torque app with the sensor info.

Thanks for the help.
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