Please please help
 

ok people iv searched for house and cant find nothing.. I have a 2005 mazda 3 2.3l MT sp23 edition... I bought the car with 77k miles... on the drive home with it it started to screw up... CEL came on... took it back to the dealer and they found out it was the front o2 sensor and the cranksensor... now its been about 3 months and everything seemed fine BUT the other day I pulled into work and the car was idleing at about 550-1000 rpms.... on the drive home form work yesterday the CEL came back on and I scanned it to get these codes


P0335
P2188 AND
P2196

THE P0355 CODE IS crank sensor A circuit maulfuncion..

p2188 was bank system 1 to lean at idle
and p2196 was system to lean bank 1 system 1..

please please please can someone give me adive on what to do.... im going to change the crank sensor to see if that helps but I don't know what to do about the other 2 codes