66 Technical Description
Fault handling,
(I)
catalyst damaging misfire
In the event of misfiring which is harmful to the three
way catalytic converter the driver is immediately
warned by the CHECK ENGINE lamp (MIL) flashing
at a frequency of
1 Hz,
regardless of whether it was
already on or not. A diagnostic trouble code is also
generated.
To facilitate fault diagnosis a special code is gener-
ated at the same time if there is less than
1
O
litres of
fuel in the tank.
For the CHECK ENGINE lamp
(MIL)
to go out by it-
self, 3 consecutive driving cycles carried out under
similar conditions as when the fault first occurred
must be completed without any misfiring which is
harmful to the three way catalytic converter occur-
ring.
For the diagnostic trouble code to be cleared, as well
as any special code for low fuel level that may also
have been generated, 40 faultless warm-up cycles
must also be completed.
Saab 9000
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