Engine P1151, P0136, P1518, Still on after fixing it

I replaced the bank 1 sensor 1. Now it says it has a code for bank 1 sensor 2, and it says its running lean and I also fixed the retainer bushings and its showing the code again. Anyone know what it would be? It started to show codes after I finished working on the heater core connectors.
 
  • Sponsors (?)