EVAP System Leak Detection Pump Control Circuit High

Where it lives

For P2402, the circuit described runs through the pump. The description of P2402 reports a fault at the pump.

Check these first

• A short to voltage on the leak detection pump control wire
• A failed leak detection pump
• An open in the pump ground circuit
• A sticking pump that forces a high driver reading

What to do next

1. Read the leak detection pump control voltage on a scan tool
2. Test the pump control wire for a short to voltage
3. Check the pump ground circuit
4. Command the pump and watch for a stuck condition
5. Replace the leak detection pump if the wiring tests good
6. Clear the code and retest

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