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Rear O2's

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Old 12-03-2005, 06:55 PM
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Default Rear O2's

If im throwing codes for rear o2's(bank 1&2, sensor 2) is my car dumping fuel to compensate?
Old 12-03-2005, 07:03 PM
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Originally Posted by Spenser309
If im throwing codes for rear o2's(bank 1&2, sensor 2) is my car dumping fuel to compensate?
What are the codes? No way of knowing what it's doing with out those DTC's...
Old 12-03-2005, 07:24 PM
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P0160 and P0140

Last edited by Spenser309; 12-03-2005 at 09:33 PM.
Old 12-03-2005, 07:29 PM
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Originally Posted by Spenser309
bank 1&2, sensor 2 no activity detected
To the original question: With ZERO activity, I would think the PCM would stay like it was. However, those GM guys are always thinking.

What incident turned off/unplugged the rear O2's?

Sims would work, but tuning the rear O2's out or limitting their ability to throw unnecessary/unwanted codes is better.
Old 12-03-2005, 09:33 PM
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would i pass a obdII readiness test with the codes deleteted
Old 12-03-2005, 09:44 PM
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The rear o2's are only used by the pcm to monitor the efficiency of the converters, they are not used to alter stft or ltft.




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