97 2.5 5 speed. out wheeling yesterday, coming down a very steep Rocky slope, used 4low to slow me down on the decent. it nearly stalled a time or two going over rocks but I used a bit of throttle and got down. when I reached the bottom I looked down and saw the check engine light was on. took it straight to AutoZone checked code, it came up MAP sensor low input, according to the guy. (they wont let you read your own codes at our AutoZone) he cleared it and said if its running fine don't worry. well im taking it on a trip (1400 miles round trip) next month. if its going to become a problem I'd like to fix it now. what do you guys think?