That Check Engine light is really getting to me. My aunt says "The mechanics say its very hard to get to" well, is that true? Its a 2002 Ford Focus, either LX or SE, I will have to look again. I thought i saw the word Zetec on the top of the engine. Her car also gets 17MPG, and jumps out of gear a lot though yesterday it ran perfect for the whole second part of our highway trip for 40 miles. I do not know what its issue is I also saw a 2003 Transmission that has notes "ck id xs4r n5lua" from car-part.com and i do not know what this means, trying to help my aunt out here, maybe even change her PCV valve I am most curious to know if that 2003 trans will bolt up to the 2002. If they are all 2.0's.. perhaps i need to call and ask what specific car it came out of.