With first one key then all keys - When I turn the key I get normal accessory mode (no error lights) but no sounds or actions from the engine. No trying to turn over or anything. First one key seemed to stop working (again, everything else works - I can lock/unlock and put into Accessory mode) so I used the other key and drove around but eventually both keys won't start the car. Almost sounds like a programming or ignition issue. Any ideas?