Engine light
7 codes from Orielly's. I have changed out all spark plugs.
Four O2 sensors in exhaust, two per side. Maps sensor.
Oil filter and oil change, and never had problem with truck
performance until I did all the work. All parts were bought
from Orielly's. I just bought 1 coil pack and 2 new spark
plugs to replace but not sure if that will fix problem.