Hey guys my buddy is throwing two codes and I really dont understand eather of them....

P1684 Metering Oil Pump Position Sensor Circuit Malfunction
P1294 Injector High Side Open - Bank 2/Target idle not reached

any insight or explinations or tips would be appriciated...

 

p1684-meaningless-battery has been disconnected in the last 50 ignition cycles
p1294-check for vacume leaks and clean iac motor passageways and throttle body