My volvo 850 came up wth some codes .
143 Front knock sensor signal

232 Long term fuel trim, idling

315 EVAP system

414 Boost pressure regulation

433 Rear knock sensor signal

435 Front HO2S slow response
Which code should i fix asap ? ...

And another thing in the mornings when i turn on the car & try to leave sometimes it wont wanna shift to second .. I would have to hold the shifter all the wat down . It would still be on D but i wuld have to like push the shifter down to like lock it on D .. I was thinking its my transmission because it also be giving me a flasing arrow when on D !! I would have to turn off the car & turn it back on sit there for a min for th car to be in good conditions to drive .. Please help i like my volvo 850 & i really wanna keep it ..