check engine light October 01, 2005, 01:33:03 AM so i went to the track tonight, and got 2 good runs in,but it ran kinda rough, and check engine light came on on my way home,i got a KOEO Code 18 ( IDM circut failure or " SPOUT " grounded )Code 28 (Vat Sensor out of range " self test range " ) Code 48 ( loss of IDM signal )What do i do about any about the codes i got ?! I got a 2.4 60 ft time and a 2.6 timeOne 9.8 1/8 mile, one 9.9 1/8 mileBoth running rough, and these codes, and stock motor just turbo swap !! ..Let me know !! Quote Selected