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P0140 Bank 1 Sensor 2 Insufficient -help-

Old Jun 29, 2005 | 03:09 PM
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Default P0140 Bank 1 Sensor 2 Insufficient -help-

Could someone tell me which sensor is throwing this code? Is this a problem with an after cat sensor? I thought Bank 2 was the after cat sensors....
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Old Jun 29, 2005 | 03:26 PM
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P0140 is Bank 1, Sensor 2. Bank 1 is drivers side, Bank 2 is passenger side. Sensor 1 is precat, Sensor 2 is post cat.
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Old Jun 29, 2005 | 03:32 PM
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hmmm gotta go re-tune... Thanx 2001NBMZ28 !
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Old Jun 29, 2005 | 05:20 PM
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Not necessarily, see thread:

https://ls1tech.com/forums/pcm-diagnostics-tuning/343118-rich-lean-switch-points-o2-gain-vs-error.html
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