Please give the drive cycle information to get these monitors set to 'Ready' status. All other monitors are OK
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2009 Toyota Corolla Question: Car failed the DEQ because O2 sensor & Catalyst are 'Not ready'. Drive cycle plz
the drive cycle is drive 5 mins at 45 mph without touching brk slow to below 25 mph then back to 45 mins again for 5 mins all without touching brk pedal. the o2 might take several cold starts if the heater circuit was the 02 code.this all assumes the issues were repair correctly
ReplyPavan_R, May 05, 2012, 02:41Rookie
I realized that the O2 sensor when not ready can cause the catalyst monitor to not run & report as not ready. So most likely my problem is with O2 sensor - what is the drive pattern to get that ready?