Hidden Surprise

Sunday morning rolls in and we slowly pack up for the road. We are both going about our normal move out tasks. Katie is making breakfast and putting things away, and I'm outside unhooking the RV and prepping the jeep for the next leg of the trip. I'm groggy and tired from the night before. Hungover or not, we've got miles to cover. Roo has a hot date with Rocky Mountain Cummins in Montana on Tuesday and it's still a couple of hundred miles away. 
Three miles out of town and trouble strikes. FLASH! The check engine light comes on. I immediately let off the gas and start sweeping the gauges. The tachometer is bouncing up and down. Not good. I pull over and watch the gauge and listen intently. Motor sounds good.  Rev's up ok... guage must be the problem. In an effort to make the boys jobs at the Cummins shop easier I sprayed the motor off the night prior to rid it of two weeks worth of dusty back road filth. Bad idea. I call up the shop that is going to do the work and he tells me what sensor feeds that signal. We leave Roo sitting on the side of the road for a parts run to town. I pop into O'reillys and pick up the sensor I need along with a few tools. I've only brought a limited selection. 
Under the RV and laying in the gravel I begin the tackle the job. Turns out the sensor is tucked behind two pumps on the side of the motor. An absolute nightmare to get to it. After 45 minutes I am finally able to get the socket on the bolt to loosen the mount. Yeah, 45 minutes just to figure out how to thread the extensions through the wire harness and mounts of the power steering pump and injection pump. The bolt comes out but the sensor is wedged in. Another 2 hours trying to create some sort of extraction device and I get nowhere. Time to give up and move on.
I don't like to give up. It bothers me. Alas it's 1500 and we still have 3 hours of driving in order to get to Billings. I put everything away and fire up Roo. Gauge is good. No check engine light. Guess she just needed to know that I cared. 
We pull into Cabela's around 1845 and breathe of sigh of relief. When will the problems end?