97 Ford v10 had a p0118 error code, bad coolant temp sensor, replaced. Still get code. Now the Cold Hot gauge doesn't work, stays below the C. My scan gauge is showing a constant temp of 40* after e...
It's best to use an OEM coolant temp sensor. Pull off the positive chassis battery cable for +-5 minutes then reinstall it. That should clear the fault code. If it comes back, you probably still have a bad/wrong sensor or a wiring issue.
You probably have a V-8 if you have a 1997. If you told the parts guy you have a V-10 instead of a V-8 that might explain it.