I need help with understanding and possibly fixing the error codes i am getting. I am getting p-0120 and p-1542 both are pedal position sensor errors. One is a malfunction anfd the other is electrical. I am also getting a malfunction indicator light for 1)cat not ready2)evap not ready3)2air4)o2s not ready5)ho2s not ready. Can anyone tell me if the codes have anything to do with these mil's or if they are separate. Where would be the best place to start.