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P2406 Code - Evaporative Emission System Leak Detection Pump Sense Circuit High

- Code Popularity: 11,861 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2406?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty EVAP System Leak Detection Pump
  • EVAP System Leak Detection Pump harness is open or shorted
  • EVAP System Leak Detection Pump circuit poor electrical connection
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How to Fix the DTC P2406?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2406 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2406 Description

This fault code is stored in the engine control module when there is a malfunction with the evaporative emissions control circuit. The EVAP system allows the fuel tank to be vented in a controlled manner without releasing harmful gas emissions into the atmosphere. This is achieved by periodically allowing hydrocarbon emissions from the fuel tank into the intake manifold and enter the combustion process. The engine control module monitors the circuit integrity by monitoring the inductive spike generated when the solenoid valve is switched off. This is caused by the collapse of the magnetic field resulting in a back EMF (electro-motive force). A solenoid normally has a resistance of 15 Ohms. The solenoid valve will be actuated by a pulse width modulated control via the engine control module. The solenoid can be powered up by a constant supply at system voltage or have a constant ground.
The system may not purge the carbon canister under idle conditions. The vehicle may need to be driven for the system to operate, an actuator test may be used to operate the solenoid valve with a scan tool.
Due to the presence of harmful hydrocarbons within the system manufacturers have to closely monitor the system, in some markets. This is achieved by the addition of certain hardware to measure system pressure and gas flow. The engine control module can monitor the system for leaks (both large and small) and for excessive or insufficient flow. This allows the technician access to more information relating to the fault and provides a better chance of an accurate diagnosis.

OBDII Code P2406 - Evaporative Emission System Leak Detection Pump Sense Circuit High - AutoCodes.com
P2406 Code - Evaporative Emission System Leak Detection Pump Sense Circuit High

Need More Information on the Code?

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Information for Specific Makes

  • P2406 Dodge Evaporative Emission System Leak Detection Pump Sense Circuit High
  • P2406 Hyundai Evaporative Emission System Leak Detection Pump Sensor Circuit High  📷
  • P2406 Jaguar Evaporative Emission System Leak Detection Pump Sense Circuit High
  • P2406 KIA Evaporative Emission System Leak Detection Pump Sensor Circuit High  📷
  • P2406 Land Rover Evaporative Emission System Leak Detection Pump Sense Circuit High
  • P2406 Volvo EVAP System Leak Detection Pump Sense Circuit High

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Code P2406 comments

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