For lo, Dave Johansen hath proclaimed:
> I have a 2001 Maxima with about 95,000 miles on it. A few months ago
> the check engine light started turning on for about a day or so at
> random intervals. Every time the code was P0420, and after doing a
> little searching I found out that TSB #NTB00-070a will supposedly fix
> this problem.
On the Infiniti I30, the pertinent TSB is ITB00-054b. (ITB00-054a
has been superseded; perhaps there's a b version for the Maxima.)
> (first time I've ever been there) and they told me that the O2 Sensor,
> front pipe, and Catalytic Converter needed to be replaced (which would
> cost $1400). I told them to not do anything yet.
What I was told (and what I verified at Alldata's pay side) was
that only the front pipe and an O2 sensor require replacement.
This could be the difference between a and b TSBs, maybe.
> I did a little more searching and found the actual TSB do***ent and it
> says that the first and only diagnostic that they should have done is
> to check the ECM Part Number to see if it is faulty. The TSB do***ent
> says that the ECM P/N can be found on the Consult-II self-diagnostic
> print out, but is there some way that I can find the ECM Part Number
> myself to see if they're just trying to rip me off?
That I couldn't tell you. The Infiniti service guy told me that
the first thing they're supposed to do is check that part number,
and if it's not up to the current release, to immediately update
the ECM. If it's a current number (as mine, alas, was), you get
to replace hardware.
I should point out here that the front pipe and the O2 sensor cost
just about as much as a cat.
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