P2402 Possible Causes
- Faulty vacuum pump module
- Vacuum pump module harness is open or shorted
- Poor electrical connection in vacuum pump module circuit
- Faulty Engine Control Module (ECM)
How to Fix Code P2402
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P2402 Symptoms
Possible symptoms
Illuminated engine light (or service engine soon warning light)
P2402 Meaning
5 hours after ignition is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors leaks and actuator malfunctions based on EVAP pressure.