Hey just a simple question. I have a 2000 Plain Jane Ranger with almost 70,000 miles. About a month ago the oil pressure guage started to act up. When I start the truck the guage doesn't go normal until the truck is warm. Is this a common problem? I know I'm getting oil pressure because the truck runs cherry, just want to know wether it's worth spending the time and money to replace the guage sensor. Thanks!