changing o2 sensors-V6 motors

[William Magliocco]

Forgot to add that pulling the battery not only is
safer, wipes the memory, but also resets the "learning
curve" of the ECU back to its base values.  

I don't know if that is absolutely necessary, but it
certainly can't hurt.  After all, the ECU started life
at the Audi factory in a car with new o2 sensors.

For those with CIS and earlier, and non-lambda models,
sorry for the BW.

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