P CODES (POWERTRAIN) P1200 - P1299 P1250 Questions

Hi, My Name Is Raz I Have A 2002 Mazda Millenia. I Got P1250, P1521, P0421, P0431 I'm Not Worried About Cat Right Now I Need To Fix P1250...

The Check Eng Light Came On And Stays On, The Guys At Jiffy Lube Ran A Check And Came Back With This Code But Said They Didnt Know What It...

I Have A 1998 Bmw And Have 2 Trouble Codes That Auto Zone Pulled On There Read Outs. One Of Them Is P1250 & The Other One Is P0455. Any Help...