help with code

i have a code that keeps coming up on the code readerwhen the motor is off 66c TOT sensor signal input below self-test minimum, or vane air flow circuit below minimum [E4OD] anyone know how to fix this? id appreciate any input

66 C Mass Air Flow (MAF) sensor circuit out of range (low).

http://www.njtacc.com/tech/eec_codes.html

Start by cleaning the connector at the MAF as well as taking off the air filter and seeing if the screen needs to be cleaned. Search here for tips on cleaning.

Still no joy, start cleaning/replacing grounds. Search here for details.

thats not a good code to have, double check that the maf is plugged in securely