what does it mean if my Toyota Corolla E140 (2006-2013) shows a P0440 code

Learn how to diagnose and fix P0440 EVAP system malfunction in Toyota Corolla E140. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety during repairs.

2. Inspect and Replace Fuel Cap

• Sub-steps:
  1. Remove the existing fuel cap.
  2. Inspect the rubber seal for cracks or deformation.
  3. Replace with a new fuel cap if damaged.

Tools Required: None specific, just hands.

3. Repair or Replace EVAP Components

• Sub-steps:
  1. Locate the EVAP purge valve and disconnect the electrical connector.
  2. Remove the EVAP purge valve using a socket set.
  3. Install the new EVAP purge valve and reconnect the electrical connector.

Tools Required: Socket set, ratchet.

4. Inspect and Repair Vacuum Lines

• Sub-steps:
  1. Visually inspect all vacuum lines connected to the EVAP system.
  2. Replace any damaged or cracked hoses with OEM parts.
  3. Ensure all connections are secure and correctly fitted.

Tools Required: Pliers, hose clamp tool (if necessary).

5. Smoke Test EVAP System

• Sub-steps:
  1. Connect a smoke machine to the EVAP service port.
  2. Activate the smoke machine to detect any leaks in the system.
  3. Repair any leaks identified during the smoke test by replacing damaged components.

Tools Required: Smoke machine.