Hi,\n\nNeed to find out what my next step is. Got a Honda Prelude, 1999, with\n180K highway miles. I just replaced the cat since the engine light came on\na few months ago, plus my emissions/smog test was due soon. Even the dealer\ntold me the light is a likely indicator for a new cat, AND it's OK to drive\nit until I'm due for my registration renewal.\n\nSo I replaced it two weeks ago. I was also informed that my cat had a\nbuilt in O2 sensor, hence it was expensive. So I drive it around a little\nbit but the light didn't go off. So I decided to fork the money over to at\nleast get the emissions test and find out what else is failing. All passed,\nexcept the MIL because the light is still on.\n\nTech also said do not disconnect the batter because that resets the\ncomputer, and it'll push me about 1 week of driving since the computer has\nto be in it's pattern (whatever that means). highway driving is not enough\nbecause it's reading "high" speed? Dunno why that matters.\n\nThe emissions test center said I have another sensor at the top that most\nlikely wasn't replaced. Is this true? More than 1 cat sensor?\n\nMy registration renewal is due next week. The MIL light turned off. But it\nhas been on-off in the past few months also. I'm wondering if it's off due\nto increased stop-n-go driving in the city recently, and the computer is\nin its "normal" pattern. I'd like to avoid having to go for another test\nto see if it'll pass.\n\nWhat do you folks recommend?\n\nThanks in advance.