Would it be possible to close a relay upon air injection pump activation which would switch a resistor in parallel with the O2 sensor thereby tricking the car into believing the air injection system was working properly? I believe this technique has promise in solving an annoying check engine light. However, I don't know the appropriate O2 sensor resistance values during air pump operation or the resistance values indicating an air injection error condition. Any knowledgeable on this matter feel free to weigh in. Any assistance is greatly appreciated.