9-3 Viggen Coupe (9400) L4-2.3L Turbo (B235) HO (1999)
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oxygen sensor 1 voltage
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oxygen sensor 2, voltage
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The voltage change in the rear sensor is registered during one oxygen sensor 1 period with a pulse ratio that is 30-80% (+)
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Correct the voltage change with respect to load and engine speed
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Add the voltage change in memory
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50 periods totalled
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Total below limit
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Diagnosis performed during this trip
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Fault criteria for catalytic converter fulfilled