I'm getting a code 24 on my 86 GN after doing a GNX dash conversion. I know it is throwing a code because the stock VSS converter box (green) is no longer in the circuit. I get my MPH signal on the electronic VDO speedo through a standalone VSS that plugs into the factory lower speedo cable going to the trans. The ECM is not seeing a MPH signal. Will this cause any problems other than probably not allowing the TCC to lockup? I just drove the car around town and it seemed fine. Can you make this code stay off with chip programming?