Skibarefoot is correct, when I got to thinking about it I was thinking the one on the top was the oil temp sensor, I went out and looked at mine and realized I forgot about the one on the back of the reservoir was the temp sender and the top one was pressure. Doh 
It is called an oil pressure switch so maybe yours is on the fritz, and sending trons in bad ways.
__________________
Ken
2002 F-350 CCLB 4X4, HD4R100 , Riffraff FRx, Riffraff CAC Boots & PRI's, Bellowed Up-Pipes, 4" Diamond Eye exhaust, Powerslot rotors, ATS Ported Compressor Housing, DP Tuner-F6, Autoenginuity, EEC-V Breakout Box, KCM S.S. HPX Line, S&B Filters intake, Quad Autometer gauge pod, Inovations canopy, Banks Big Head wastegate actuator, 6.0L Trans Cooler, Spin-on Transmission filter with custom bracket, Zoo-dad, Dieselsite Coolant Filter, Cobra 29LTD/NW CB, DVD and always looking to do more....  
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