Detailed Description of Error P2406

The OBDII error code P2406 indicates that there is a problem with the Evaporative Emission System Leak Detection Pump Sense Circuit. This system is responsible for detecting leaks in the evaporative emission control system, which is designed to prevent fuel vapors from escaping into the atmosphere. The leak detection pump is used to create a vacuum in the system, and the sense circuit monitors the pump''s operation. If the sense circuit detects a high voltage or resistance, it will trigger the P2406 error code.

The Evaporative Emission System is an important part of a vehicle''s emissions control system, and a malfunction can cause fuel vapors to escape, leading to increased emissions and decreased fuel efficiency. The P2406 error code is typically accompanied by a Check Engine Light (CEL) on the dashboard, indicating that there is a problem that needs to be addressed.

Possible Causes of Error P2406

• Faulty Evaporative Emission System Leak Detection Pump
• Faulty Leak Detection Pump Sense Circuit
• Short circuit or open circuit in the sense circuit wiring
• Corrosion or damage to the sense circuit connector
• Faulty Powertrain Control Module (PCM)
• Incorrect or faulty wiring harness
• Vacuum leaks in the Evaporative Emission System
• Clogged or restricted fuel tank vent valve
• Faulty Fuel Tank Pressure Sensor

Possible Fixes for Error P2406

• Replace the Evaporative Emission System Leak Detection Pump
• Repair or replace the sense circuit wiring
• Clean or replace the sense circuit connector
• Update or replace the Powertrain Control Module (PCM) software
• Inspect and repair any vacuum leaks in the Evaporative Emission System
• Clean or replace the fuel tank vent valve
• Replace the Fuel Tank Pressure Sensor
• Perform a smoke test to identify any leaks in the Evaporative Emission System