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EVAP pressure during EVAP key-off monitor

EVAP pressure during EVAP key-off monitor

The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is in 724 to 752 mmHg* and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM will illuminate the MIL and set DTC if this malfunction is detected in consecutive drive cycle. *: Typical valve

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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