P2405 Fault Code

Evaporative Emission System Leak Detection Pump Sense Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2405 fault code indicates an issue with the Evaporative Emission System Leak Detection Pump Sense Circuit being low. This circuit is crucial for monitoring the operation of the leak detection pump, which is responsible for testing the integrity of the evaporative emissions system to prevent fuel vapors from escaping into the atmosphere. When this code is triggered, it typically points to a malfunction in the electrical relay, wiring, or the pump unit itself.

What are the symptoms of the P2405 code?

• Check Engine Light (CEL) illuminated
• May experience fuel smell from the vehicle
• Possible decrease in fuel efficiency
• Emission testing failures

What causes the P2405 code?

• Faulty leak detection pump
• Damaged wiring or connectors in the sense circuit
• Issues with the vehicle's Engine Control Module (ECM)
• Bad grounds affecting circuit function

How to fix P2405?

• Inspect the wiring and connectors associated with the leak detection pump for damage or corrosion
• Test and replace the leak detection pump if faulty
• Check and repair any ground issues within the circuit
• Clear the fault code and perform a system test drive to ensure the issue is resolved