To the best of my knowledge it has a bad driver’s side knock sensor. Knock sensor isn’t whats keeping it from passing inspection though its the o2 sensor code. The rear o2 sensor code(s) came back on after I replaced them both. Checking the cats led me to find one clogged. Both have been gutted since. I’ve heard that these cars are sensitive and “know” if the cats have been gutted but I no longer have money to spend on it. I will be losing my liscense this month and the car needs to go. I’ve been trying to diagnose the problem but I don’t have a manual so the best I’ve been able to do without spending any more money is stare at wiring diagrams online. My hands are tied and my patience is up.