P2401 low

Evaporative Emission System Leak Detection Pump Control Circuit Low

The P2401 code means the vehicle's onboard diagnostic system has detected: Evaporative Emission System Leak Detection Pump Control Circuit Low. 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 inspection
  • No noticeable driving symptoms
  • EVAP monitors incomplete
  • Possible faint fuel odor

Probable Causes (Ranked by Likelihood)

  • Short to ground in leak detection pump wiring Very High
  • Failed leak detection pump motor (shorted) High
  • Corroded pump connector causing low resistance Moderate
  • ECM driver circuit shorted to ground Low

Step-by-Step Diagnostic Procedure

  1. Measure voltage at the leak detection pump connector

  2. Check pump motor resistance (should not read near zero)

  3. Inspect wiring for chafing or exposed conductors near the fuel tank

  4. Check connector for corrosion or water damage

  5. Verify ECM output signal with a test light

Common Fixes by Vehicle

What techs usually find when diagnosing P2401 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 low — the LDP (natural vacuum/pressure pump on the canister) or its wiring has failed. Inspect the connector and harness near the pump first. The pump assembly is a bolt-in replacement. After repair, the EVAP monitor needs a drive cycle to set ready.

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 P2401?

Yes, safe to drive normally. This is an emissions-related code with no impact on engine performance or vehicle safety.

What causes P2401?

Typically a shorted leak detection pump or wiring that has been damaged by road debris near the fuel tank area.

Is P2401 expensive to fix?

Usually $100 to $400. Pump replacement is the most common fix. Wiring repairs near the fuel tank are less expensive if accessible.

Sources

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

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