1998 nubira take time to start and o2 sensor porblem

[hborsa]

hi
i have nubira 1.5 hitchback model 1997 have problems
1- engine take time to start and after startstill 1 minute and shut off
2- on my scanner ( lanuch x431 ) faulte code in O2 sensor and when engine shut off the engine s vibration for 4 sec and cut
i cheked all system ( voltag - map sensor- temperature sensor --
but not fault

[ecartoolcn]

Are you using the launchx431 gx3 ?
we think it is steady
we sold a lot and most car repair shop said it is good