P2401
System
Powertrain (EVAP)
Scanner som krävs
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

EVAP System Leak Detection Pump Control Circuit Low

Understand P2401, common causes, and the right FOXWELL scanner to diagnose it.

EVAP leak detection pump control circuit low — distinct from DPF on some platforms; also used as emissions pump circuit on Asian imports.

Vanliga symptom

  • Check engine light
  • EVAP monitor not ready

Typiska orsaker

  • Short in LDP circuit
  • Failed leak detection pump
  • ECU driver fault

Vilken scanner behöver du?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade FOXWELL-scannrar

Vanliga frågor

Can I diagnose P2401 with a basic code reader?
P2401 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P2401?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.