P2402 Isuzu 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)

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 Isuzu 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.