Got a check engine light while driving yesterday. Today I took it to mechanic and he got two errors. 1. O2 sensor faulty (the less important one?) and 2. Cylinder 2 is misfiring. Two questions: How much is O2 sensor and where is it? And second, what is the most common and some less common problems for a cylinder to misfire? Is it a spark plug problem usually? Thanks for the info.
PS: I don't think I can attribute these two problems to DRIVING HARD, necessarily. >