Saab 9000 - Page 199

196 Fault diagnosis
Diagnostic trouble codes·
,P1170,
P1171,
P1172 .
Closed loop
Symptom of fault
The.
CHECK
ENGINE lamp (MIL) is on. Any other
diagnostic trouble codes (low fuel level, misfiring, ox-
ygen sensor, pressure sensor)
Conditions
• Coolant temperature above 60°C (140°F)
• Closed loop active.
P1170: All-embracing DTC.
P1171 : Closed loop
>
25% for more than 20 sec.
P1172: Closed loop
<
-
25% for more than 20 sec.
592Fa
589
µp
µp
67
H70-1
23
47 67
50
Diagnostic help
If
the
closed
loop fault has arisen on account of low
fuel level, this will be indicated by diagnostic trouble
code P1416 also being generated.
-
Closed loop status can be ascertained by means of
the ISAT scan tool.
- Select "READ FUNCTIONS".
- Select "LAMBDA CONTROL".
Current closed loop status
± 25% will be displayed.
Saab 9000