Evaporative Emission System Leak Detection Pump Control Circuit High
What does P2402 mean?
The P2402 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Control Circuit High. This is a low severity code.
Common Symptoms
- Check Engine Light illuminated
- Failed emissions test
- No drivability symptoms noticed
- EVAP system readiness monitor not ready
- Slight fuel odor possible
Probable Causes (Ranked by Likelihood)
- Open circuit in leak detection pump wiring Very High
- Disconnected leak detection pump connector High
- Failed pump motor (open winding) Moderate
- Broken wire in harness to pump Moderate
Step-by-Step Diagnostic Procedure
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Check if the leak detection pump connector is plugged in
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Measure pump motor resistance (infinite reading means open winding)
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Inspect wiring from ECM to the pump for breaks
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Check for damaged wiring near the fuel tank from road debris
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Verify voltage at the pump connector with key on
Frequently Asked Questions
Can I drive with code P2402?
Yes, completely safe to drive. This emissions code has no effect on drivability. Repair before your next emissions inspection.
What causes P2402?
Usually a disconnected pump connector or broken wire. Check the connector first since it may have been knocked loose by road debris.
Is P2402 expensive to fix?
Typically $100 to $400. A disconnected connector is a free fix. Pump or wiring replacement is moderately priced.