Oil gauge problem.

[302Xplorer]

With in the last 2 weeks my oil pressure gauge does not activate until about 1 min. after start up. It has only happened after the weather has become colder. Is this a serious problem or just a gauge malfunction.

Thanks,

X

 

[Bronco638]

Sounds like it might be the sending unit. Once the gauge registers, does it seem to operate correctly? What weight oil is in the engine now?