Help error 0411

97 jetta , 2.0 , 4 speed std. , GL

error code 0411 2nd airflow

fix = 1st circuit failure or open fuse

where is this and what does it look like ?

fix 2 = bad air pump or clogged hose

again where is pump and witch hose

inspection due

I have replaced air filter, cleaned large hose to choke (oil in hose wiped clean) checked those small plastic hose that attach to air box , they seem ok and pass air through them ok...stumped help

all so does the brown plastic tube from the airbox go on top position or bottom on the air box the black one come from the motor.

does it make a difference..