Typical Malfunction Thresholds

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"Saturated" indicates EVAP pressure change is less than 0.75 mmHg (0.1 kPa) for 30 seconds.

P2401: Vacuum pump stuck OFF

TYPICAL MALFUNCTION THRESHOLDS (VACUUM PUMP STUCK OFF)

Either of the following conditions is set
0.02 inch leak pressure	-7.5 mmHg (-1 kPa) or more, or less than -33.75 mmHg (-4.5 kPa)
0.02 inch leak pressure	Not saturated

P2402: Vacuum pump stuck ON

TYPICAL MALFUNCTION THRESHOLDS (VACUUM PUMP STUCK ON)

Either of the following conditions is set
0.02 inch leak pressure	-7.5 mmHg (-1 kPa) or more, or less than -33.75 mmHg (-4.5 kPa)
0.02 inch leak pressure	Not saturated