David:
David Schwartz wrote:
> Brought my 2000 Max with just over 90,000 miles in today with the
Service
> Engine Light
> My receipt says PO430
> Mechanic says all 4 O2 sensors have to be changed and then there was a
95%
> chance the light will go off.
> Over $950 before tax.
> Told him no. Will go to Nissan.
> Any thoughts?
> Thanks in advance.
>
Recently I had the exhaust piping, cat, silencer, and muffler replaced
on my '97 Max. I had a larger diameter single pipe system with a
performance muffler installed. There is more power and a nice quiet
purring sound.
For more than one year the engine light was on. Every shop wanted to
replace the O2, mass and knock sensors. The surprise was that after the
exhaust work had been completed the engine light was off.
The simple matter of a new cat unit, cleaning the existing sensor
electrical contacts and re-attaching them with good connections worked.
The new larger diameter free-flow cat unit was part of the upgrade,
however, I wonder. Was the cat unit replacement necessary to get the
engine light to be off?
Ralph Hertle
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