my check engine light is on ,has been for a while, now my car failed smog test on 2000 Toyota Echo

AIR INJECTION - filed diagnostic test said, mass air flow circut+ air temp.sensor circut

by in Potwin, KS on February 06, 2013
2 answers 1 comment
ANSWER by on February 07, 2013
you need to have circuits tested to start with and if good test sensors.are they unpluged or have corrision on them
COMMENT by on February 07, 2013
Agree with #1....you can clean the MAF sensor yourself.
ANSWER by on May 30, 2014
take out the MAF, clean it inside , the 2 resistors , spray in brake cleaner, use "Q" tip to wipe off, let it air dry, 10-15 minutes. then disconnect battery or reset codes with code checker, car should run fine and chk light out. I dont know anything about smog test, we don't have that here in Canada. SORRY