No. Wait for the new sensors. They may both use part of the same 0 to 5 volt range but they are not scaled the same. If you're using a Stage 2 computer with the stock sensors it's not as outright dangerous as using the 3 BAR sensor on a stock computer since the S2 will think there's way more boost than there is and inject a lot of fuel but it's still bad. You may be showing lean due to the PCM trying to relearning and adjust (it won't be able to since it's programmed and expecting a 3 BAR sensor) or the fact it is possible to dump so much fuel it can read incorrectly on the wideband.
And the stock sensor is 2.25 BAR and not a 2 BAR sensor.
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Eric H. - '04 Neon SRT-4 (eBlue/S2)
'92 Dodge Daytona IROC R/T - '91 Dodge Spirit R/T
'89 Caravan SE Turbo - '08 Cobalt SS Turbo
'04 SVT Focus (EAP ZX3) - '02 SVT Focus (Vortech)
'81 & '85 Chevy Citation X-11 - '93 Olds Achieva SCX W41
plus a couple other turbo Dodges, a turbo GM, and a bunch of other stuff...

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