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Suppressing error codes

oldgold
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oldgold Member

oldgold

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I have a 2002 Boxster with an aging o2 sensor that periodically causes the check engine light to come on. I've used my Durametric tool to reset the error code several times. I will eventually get around to replacing the post-cat o2 sensor, but I'm curious as to how the ECU adapts to the signal. Is there any effect on performance?

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pk2 Member

pk2

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The O2 sensor is a “narrow band” sort. As I understand it it trips either one way or another (to rich or to lean no grey area ) & trips the CEL.

In normal circumstances the ecu probably adapts the fuel accordingly by either sending more or less through to the injectors. It may also mess with the timing, don’t know.

Does it effect performance? I suppose to some degree but since it is only a “yes/no” switch you have no idea to what degree it is out of whack.

Regards, PK

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