P2401 – Low Evaporative Emission System Leak Detection Pump Sense Circuit

P2401 Possible Causes

What does it mean?

  • Faulty vacuum pump module
  • Vacuum pump module harness is open or shorted
  • Poor electrical connection in vacuum pump module circuit
  • Faulty Engine Control Module (ECM)

How to Fix Code P2401

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2401

Symptoms

possible

Check Engine Light illuminated (or Service Engine Soon warning light)

P2401 Meaning

5 hours after ignition is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors leaks and actuator malfunctions based on EVAP pressure.

P2402 – High Evaporative Emission System Leak Detection Pump Control Circuit

P2402 Possible Causes

  • Faulty vacuum pump module
  • Vacuum pump module harness is open or shorted
  • Poor electrical connection in vacuum pump module circuit
  • Faulty Engine Control Module (ECM)

How to Fix Code P2402

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

P2402 Symptoms

Possible symptoms

Illuminated engine light (or service engine soon warning light)

P2402 Meaning

5 hours after ignition is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The Engine Control Module (ECM) monitors leaks and actuator malfunctions based on EVAP pressure.

P2403 – Evaporative Emission System Leak Detection Pump Sense Circuit / Open

P2403 Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit
  • Faulty purge valve
  • Clogged or damaged charcoal canister

How to Fix Code P2403

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2403

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P2403 Meaning

The engine control module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak detection system is running. A diagnostic code is stored if the pump’s current consumption in the leak detection pump unit varies too much during the reference phase.

P2404 – Evaporative Emission System Leak Detection Circuit Range / Performance

P2404 Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit
  • Faulty purge valve
  • Clogged or damaged charcoal canister

How to Fix Code P2404

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2404 Symptoms

Possible symptoms

Illuminated check engine light (or service engine soon warning light)

P2404 Meaning

The Engine Control Module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak detection system is running. A diagnostic trouble code is stored if the current consumption of the pump in the leak detection pump unit varies too much during the reference phase.

P2405 – Low Emission System Evaporative Leak Detection Pump Sensor Circuit

P2405 Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit
  • Faulty purge valve
  • Clogged or damaged charcoal canister

How to Fix Code P2405

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2405

Symptoms

Possible

Illuminated engine light (or service engine soon warning light)

P2405 Meaning

The Engine Control Module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak detection system is running. A diagnostic code is stored if the current consumption of the pump in the leak detection pump unit varies too much during the reference phase.

P2406 – High Evaporative Emission System Leak Detection Pump Sense Circuit

P2406 Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit
  • Faulty purge valve
  • Clogged or damaged charcoal canister

How to Fix Code P2406

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2406 Symptoms

Possible symptoms

Illuminated check engine light (or service engine soon warning light)

P2406 Meaning

The Engine Control Module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak detection system is running. A diagnostic code is stored if the current consumption of the pump in the leak detection pump unit varies too much during the reference phase.

P2407 – Evaporative Emission System Leak Detection Circuit, Intermittent/Erratic Detection Circuit

P2407 Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit
  • Faulty purge valve
  • Clogged or damaged charcoal canister

How to Fix Code P2407

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2407 Symptoms

Possible symptoms

Illuminated check engine light (or service engine soon warning light)

P2407 Meaning

The Engine Control Module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak detection system is running. A diagnostic code is stored if the current consumption of the pump in the leak detection pump unit varies too much during the reference phase.

P2408 – Fuel Cap Sensor/Switch Circuit

P2408 Possible Causes

  • Faulty fuel cap sensor/switch
  • Fuel cap sensor/switch circuit open or shorted
  • Poor electrical connection in fuel cap sensor/switch circuit

How to Fix Code P2408

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

P2408 Symptoms

Possible symptoms include:

Illuminated engine light (or service engine soon warning light)

P2408 Meaning

The Engine Control Module (ECM) monitors the fuel cap sensor/switch. The OBDII code is set when the fuel cap sensor/switch circuit is outside factory specifications.

P2409 – Fuel Cap Sensor/Switch Circuit Range/Performance

P2409 Possible Causes

  • Faulty fuel cap sensor/switch
  • Fuel cap sensor/switch circuit open or shorted
  • Poor electrical connection in fuel cap sensor/switch circuit

How to Fix Code P2409

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2409 Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P2409 Meaning

The Engine Control Module (ECM) monitors the fuel cap sensor/switch. The OBDII code is set when the fuel cap sensor/switch circuit is outside factory specifications.

P240A – Leak Detection Pump Heater Control Circuit / Open

P240A Possible Causes

  • Faulty leak detection pump
  • Leak detection pump circuit open or shorted
  • Poor electrical connection in leak detection pump circuit

How to Fix Code P240A

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P240A Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P240A Meaning

The engine control module (ECM) monitors the power consumption of the leak detection pump. This diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is running. A diagnostic code is stored if the current consumption of the pump in the leak detection pump unit varies too much during the reference phase.