One problem related to check engine light on has been reported for the 2002 Mazda B4000. The most recently reported issues are listed below.
The check engine light has come on 3 times in 22000 kms the mechanic said not to go over 140km. Bought when I bought the truck the sales man never told any thing about it. I have passed cars and trucks on a four lane high way and some times you got to speed up to get buy. When the speed limit is 110 km and they made me pay $65 bucks to fix it. Something I didnt even no about or was told.