LS1TECH - Camaro and Firebird Forum Discussion

LS1TECH - Camaro and Firebird Forum Discussion (https://ls1tech.com/forums/)

- PCM Diagnostics & Tuning (https://ls1tech.com/forums/pcm-diagnostics-tuning-7/)

- - Rear O2's (https://ls1tech.com/forums/pcm-diagnostics-tuning/417933-rear-o2s.html)

Spenser309

Dec 3, 2005 06:55 PM

Rear O2's

If im throwing codes for rear o2's(bank 1&2, sensor 2) is my car dumping fuel to compensate?

SSINFUL

Dec 3, 2005 07:03 PM

Quote:

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...

Spenser309

Dec 3, 2005 07:24 PM

P0160 and P0140

SSINFUL

Dec 3, 2005 07:29 PM

Quote:

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.

Spenser309

Dec 3, 2005 09:33 PM

would i pass a obdII readiness test with the codes deleteted

Big_Brother

Dec 3, 2005 09:44 PM

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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