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Re: Ray - help on monitoring drive cycle of CAT(O2 sensor) - more questions
[email]wenmang@yahoo.com[/email] wrote:[color=blue]
> Thanks Ray. Every reader in this group may have idea who is expert and
> who always provide sound advices to newbies like myself. The learning
> curve may be too deep for me and I try to ask more stupid questions as
> possible as I can. Please bear with me.
> Sorry I didn't address my question clearly. I have two Corollas. 2000
> Corolla has new CAT and 2 O2 sensors replaced and ready for State
> inspection(due to bad CAT). My other Corolla(2001) had check-light
> on(MIL was set) in July and faulty code is P0420 which is the same one
> that my 2000 Corolla had/repaired for, and I had it cleared in July.
> But since then CAT monitor has been stuck for my 2001 Corolla and about
> 2 months have passed, still the monitor cycle is not done. So, I
> followed your advice and subscribed to Toyota techinfo.com and obtained
> the procedure to run the drive cycle. Now, the CAT monitor is done but
> no faulty code. That is reason why I was asking you why check-light
> went on at the first place in July. If check-light was on and faulty
> code was P0420 in July, now it disappears, what does it mean for the
> same car?
>[/color]
I am wondering whether there was a false alarm for the first time when
check-light was on or some bad thing lying there is waiting to happen.
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