P2420 - Evaporative Emission System Switching Valve Control Circuit High
P2420 Description5 hours after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure.
P2420 Information for specific makes
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