Legacy problem
 

Hi guys, does any one have any experience with a 2006 2.0 Legacy non turbo, it seems start ok but idles erratically for a few seconds after and then settles down but drives fine, ECU has been scanned and found 2 codes, P2433 Secondary air pressure sensor, high, and P2444 Secondary air pump on, malfunction. I know there is several things it could be but has anyone come across this before? Thanks in advance for any help