malibu_crawler

so i seached the forum and didnt really see anything that helped me so i thought i'd start a thread. the other day i got in my zj and started driving and i realized the speedo wasnt working and the check engine light was on. i check the code and it was code 36.So i looked it up and online i read bad map sensor. could both just stop working at the same time or could something cause a problem with both? don't want to order both sensors and then find out that its something else. its the 4.0 auto with selec-trac i did check the vacuum line on the map sensor and it looks fine.