I have an AEM a/f wideband guage. just got the gauge install about a month ago, everything was working fine till tonight when i noticed that it is not responding. When I turn on the ignition all the lights and display works like it should, but while driving the readout is stuck at 14.7 and does not move like it suppose to. Has anyone encounter or experience with this problem? Can anyone shine a light on me as to what is wrong? THANKS!!!