Last month, while on vacation in Colorado, I kept getting P0105 and pending P0105 codes, according to my code reader. The check engine light first came on as we rolled in to Durango (Elev. ~6500'). I didn't have the cruise control set on the way in, so it may have thrown a pending code earlier. The last code was set on the way home near Dumas, TX, where the elevation is ~3600'. The rest of the trip to Louisiana was code-free.
While in Colorado for 2 weeks, a full-blown or pending P0105 (or both) would be thrown within 10-15 minutes of cranking the truck. Occasionally, after clearing the initial codes, they would be thrown again on the same trip. Twice, there was an accompanying P0172 code, but this was not as persistent as the MAP sensor code.
I had a similar problem with the check engine light coming on 3 years ago in the same area, but I didn't have a code reader at the time to know which codes were responsible. I suspect the same ones, but that's pure speculation, at this point.
Down on low ground, I have not had this problem with the P0105 code, either before or after the trip. I have since cleaned the throttle body, but I have no way of knowing if this fixes anything since it'll be a couple years before we make it back to high ground. I never had any of the common symptoms of a dirty throttle body. I will scrub it again right before we make that trip, though.
Has anybody else experienced this in high altitudes? Do the low surface pressures screw with the MAP sensor?
While in Colorado for 2 weeks, a full-blown or pending P0105 (or both) would be thrown within 10-15 minutes of cranking the truck. Occasionally, after clearing the initial codes, they would be thrown again on the same trip. Twice, there was an accompanying P0172 code, but this was not as persistent as the MAP sensor code.
I had a similar problem with the check engine light coming on 3 years ago in the same area, but I didn't have a code reader at the time to know which codes were responsible. I suspect the same ones, but that's pure speculation, at this point.
Down on low ground, I have not had this problem with the P0105 code, either before or after the trip. I have since cleaned the throttle body, but I have no way of knowing if this fixes anything since it'll be a couple years before we make it back to high ground. I never had any of the common symptoms of a dirty throttle body. I will scrub it again right before we make that trip, though.
Has anybody else experienced this in high altitudes? Do the low surface pressures screw with the MAP sensor?
