P2402 Mercedes-Benz Evaporative Emission (EVAP) System Leak Detection Pump Control Circuit High
Possible causes
– Faulty Vacuum Pump Module
– Vacuum Pump Module harness is open or shorted
– Vacuum Pump Module circuit poor electrical connection.
– Faulty Engine Control Module (ECM)
– Vacuum Pump Module harness is open or shorted
– Vacuum Pump Module circuit poor electrical connection.
– Faulty Engine Control Module (ECM)
Tech description
What about the obd code?
To determine leak criterion (Reference pressure), vacuum pump creates negative pressure in canister pump module through 0.02 inch orifice and pressure is measured. If the conditions are not met, Engine Control Module (ECM) the code will be set.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P2402 Mercedes-Benz Description
5 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.
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