I tried this several differnt ways, OAT disconnected, start car with ECC on ( the display starts flashing immediately), run 5 minutes, turn off and reconnect OAT, start car and same ole flashing after minute after start, turn off, restart, same ole same ole.. Tried disconnecting OAT, ECC off and run for 5 minutes, once again the display starts flashing even though the ECC is off. Turned off and reconnected OAT and still same symptoms after about a minute. Flashing display. I am wondering if I should disconnect the battery and try and reset the whole system and start from scratch and try this trick. Has it worked for anyone else? Thanks for your input.