Hi, I am a new member. Last friday failed two inspections on my 2001 and given 10 day grace period to solve "not ready" oxygen sensor and catalyst (2001 is allowed 1 not ready). In between tests did 9 cycles thinking history needed due to stereo install one week prior(possible battery shut off). No luck! Are we talking a reset issue of the computer, sensor failure(O2,Misfire,Lamda), low voltage battery? Stock exhaust was replaced with CDX racing exhaust prior to purchase. Check engine light rarely lights and diagnosis is general misfire (checked with LDAS ). Car running excellent!