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

Learn how to diagnose and fix P0440 code in Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical shorts.

Tools Required:

• OBD-II scanner
• Smoke machine
• Socket set
• Torque wrench
• Screwdrivers

2. Inspect and Replace the Gas Cap

• Sub-steps:
  1. Remove the gas cap and inspect for cracks or damaged rubber seal.
  2. Replace the gas cap if damaged.
  3. Reinstall the new gas cap and ensure it clicks securely.

3. Inspect EVAP Hoses

• Sub-steps:
  1. Visually inspect all EVAP hoses for cracks or damage.
  2. Replace any damaged hoses using a socket set.
  3. Ensure all connections are secure and free of leaks.

4. Check and Replace the EVAP Canister

• Sub-steps:
  1. Locate the EVAP canister (usually near the fuel tank).
  2. Disconnect the electrical connectors and hoses from the canister.
  3. Remove the canister using a socket set and replace it with a new one.
  4. Reconnect the hoses and connectors securely.

5. Test and Replace the Purge Valve

• Sub-steps:
  1. Locate the EVAP purge valve (commonly near the intake manifold).
  2. Disconnect the electrical connector and hoses.
  3. Test the valve operation using a multimeter; replace if faulty.
  4. Reinstall the new purge valve and reconnect all components.

6. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use an OBD-II scanner to clear the P0440 code.
  3. Start the engine and check for any new codes.