My engine light has been on for 2 weeks now. I haven't experienced any difference in my car while driving with the light on. The codes that the OBDII give are P0406 & P2008. The P0406 says exhaust gas recirculation sensor A circuit high. The P2008 says intake manifold runner control (IMRC) solenoid control circuit. Are these big problems?? Easy to fix or do I have to bite the bullet and spend a ton of money at the dealership?? Thanks