[s-cars] S6 no start fun

[Brett Dikeman]

On Sun, Sep 20, 2009 at 8:20 PM, Steve Marinello <smarinello at entouch.net> wrote:

> So, Brett, it would then follow that since the car is now starting and
> running again, the blink process won't yield a code for the CPS?

I can't speak with 100% certainty, but if the AAN ECU behaves in the
same way as the 3B ECU, fault codes are either permanent, or tagged as
"intermittent".  Basically, if something only fails slightly/briefly,
for example, a loose connection to a knock sensor, the ECU stores it
first as an intermittent code.  If it gets worse, it's upgraded to a
"real" fault code.

I can't remember if the intermittent codes are erased after a period
of normal operation or not.  Might very well be that a code is erased
after x number of run cycles with no fault.

Some of the newer cars do some fancy logging.  When I had my R PPI'd,
the shop plugged it and did a code dump, one of the codes that came up
was "interior air quality sensor fault."  I asked them about it, and
they said it was marked as having occurred once out of a couple
hundred power cycles, and that it most likely was just a spontaneous
fluke.  Same thing for a suspension module code, which can get very
expensive, very fast.  4C is not known for its reliability or cost,
though better at both than DRC...

-B