P2402 low

Evaporative Emission System Leak Detection Pump Control Circuit High

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.

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Keep driving?
Yes, but fix soon
DIY difficulty
moderate
Estimated cost
$100 - $400 (parts and labor)
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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

  1. Check if the leak detection pump connector is plugged in

  2. Measure pump motor resistance (infinite reading means open winding)

  3. Inspect wiring from ECM to the pump for breaks

  4. Check for damaged wiring near the fuel tank from road debris

  5. Verify voltage at the pump connector with key on

Common Fixes by Vehicle

What techs usually find when diagnosing P2402 on specific vehicles — tap your vehicle for the fix and the exact part:

2007-2017 Chrysler/Dodge/Jeep & VW moderate DIY

EVAP leak detection pump control circuit high is the companion code to P2401 — same leak detection pump or wiring, opposite electrical fault. Check the pump connector and harness for damage and corrosion. Replace the LDP assembly if the wiring tests good. Allow a full drive cycle for the monitor to re-run.

Labor: 1-2 hours
Common fix part EVAP Leak Detection Pump (LDP) View on Amazon→ Compare fitment at PartsGeek→

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.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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