how to fix the P0440 code in my Toyota Corolla E170 (2013-2019)

Learn how to diagnose and fix P0440 EVAP system issues in a 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is safely parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace the Gas Cap

• Remove the gas cap and inspect the rubber seal for cracks or wear.
• If damaged, replace it with a new OEM gas cap.
• Ensure the new gas cap clicks securely when installed.

3. Inspect and Replace EVAP Hoses

• Locate the EVAP hoses connected to the fuel tank and canister.
• Remove any damaged hoses using a hose removal tool.
• Install new hoses, ensuring they are securely connected with no kinks or bends.

4. Test and Replace the Purge Valve

• Locate the purge valve in the engine compartment.
• Disconnect the electrical connector and vacuum hoses from the valve.
• Use a multimeter to test the valve for continuity and functionality.
• If faulty, replace the purge valve with a new one, ensuring proper alignment and connections.

5. Inspect and Replace the EVAP Canister

• Locate the EVAP canister, usually near the fuel tank.
• Disconnect the hoses and electrical connectors.
• Remove the canister from the vehicle.
• Install a new canister, connecting all hoses and electrical components securely.

6. Clear the Codes

• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0440 code from the system.
• Start the vehicle and check for any reoccurrence of the code.