NEED HELP P0420 and P2447

Anything will help me at this point i replaced the Downstream oxygen sensors and not too long ago I actually replaced The secondary air injection pump twice As well as valve now I'm looking at Cal converters what do y'all recommend anything will help thank you

 

P0420 can be gas cap related
P2447 can be low air pressure to secondary air valve try checking the hose that goes from pump to valve for cracks or holes

 

Haven't tried a new gas cap but my hoses look good i replaced one of them myself it's there a vacuum test i could do myself

 

Don’t rely on a hose looking good, in the past I will either just replace the questionable hose or plug one end of hose and use compressed air at the other end, you can apply soapy water to the outside of the hose to make it easier to spot a leak

Have you tried switching the hose to the bank 1 air pump and valve?

 

If you are going to replace the gas cap, only get OEM. The aftermarket ones are junk