I don't know what else to add. I tried both methods to extract the codes with no results. I have the ignition and run switches on, the engine light comes on for 4 seconds then goes off and stays off with the pins shorted together. When I tried the method of turning the ignition switch on and off with the three second intervals there are still no codes. Should there be codes showing even if they are historic?
do you get the rapid check engine light flashing?