Code 44 and 13 help

[razr_88]

i have been getting these codes for a while now, i have replaced everything from hoses to the one O2 sensor on the entire car. i don't know what to replace to fix it!! please someone help...

[maxwedge]

Check the wiring between the O2 and the pcm ,corroded connections, or cut frayed wiring.

[razr_88]

does the two codes together mean that it the wiring, and not something in the engine? I am not understanding the meaning of the two codes in combination.