Code 68(vehicle speed sensor input fault)
This is on my '95 NAS D 90. I have replaced all the gauges with VDO units. They all work great! The speedo is working nuts on. My issue with this is I'm getting this code. I'll clear and after say 20 miles the CEL comes back on. My question to you all is what can I look at this point? One other other bit of info is I'm using the YBE100540 speed sensor. I also have the 120 ohm resistor in line. Any and all input will surely be welcomed.