P0465: Evaporative Emission Control System Tank Detected (gross leak) / Purge Flow Sensor Circuit Malfunction

What does P0465 mean?

P0465 is a diagnostic trouble code indicating "Evaporative Emission Control System Tank Detected (gross leak) / Purge Flow Sensor Circuit Malfunction". The ECU is detecting a voltage reading that is below the expected range in the evap system circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Fuel smell near the vehicle
• Difficulty filling fuel tank
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Damaged or corroded wiring harness
• Loose or disconnected electrical connector
• Failed evap system sensor or actuator
• Blown fuse in the related circuit
• Poor ground connection

What should you do?

This is a significant issue that should be diagnosed and repaired soon. Avoid long trips or heavy driving until the problem is resolved. Continued driving may cause additional damage.