Mike's Workshop Manuals
: Service manuals for every vehicle
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Saab
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2001
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9-5 Base, 4D Sedan, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Fault Code Diagnosis
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P1491: EVAP Tank Pressure Sensor - Performance Problem & MALFUNCTIONAL Fuel Level Sensor
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Fault Criteria
Fault Criteria
Tank pressure pulsating at a frequency higher than 5.6 Hz with an amplitude exceeding 0.020 kPa.