8.1L, on our way to Las Vegas and about 3/4 of the way to our first stop in Wells, NV, the rig started feeling gutless going uphill. I kept the cruise control on, which seemed to mitigate the issue.
Yesterday morning we gassed up at Flying J and started off. Not even five miles out of town the check engine light came on, so we turned around and went back to Wells and spent the next several hours on the phone with Good Sam.
I managed to get a mobile repair guy to read the codes, P0131 and P0151, low-voltage circuit O2 sensors Bank 1 & 2.
I spoke to Jon Brazel, from Ultra RV, who is the nicest and most helpful person. According to him, the odds of both O2 sensors going bad is incredibly remote and points to the MAF sensor being bad. It was one of the things I cleaned, when I serviced it before the trip, so I ordered a new one and two new O2 sensors, to be safe. Barbra, the parts specialist at Ultra RV made sure they went out overnight to the dealership in Elko, where it’s being towed.
DW is incredibly calm about all of this, calling it an adventure, which is what makes her so great.