how to fix P0456 code on Ford F-150 13th Generation (2015-2020)

Learn how to diagnose and fix P0456 code in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace the Gas Cap

1. Remove the gas cap and inspect for cracks or damage.
2. If damaged, replace the gas cap with an OEM or equivalent part.
3. Reinstall the new gas cap, ensuring it clicks into place securely.

3. Check and Replace EVAP Hoses

1. Locate the EVAP hoses connected to the charcoal canister and fuel tank.
2. Inspect each hose for cracks, hardening, or disconnection.
3. If any hoses are damaged, replace them with new hoses (OEM recommended).
4. Securely attach the new hoses to the appropriate connections.

4. Inspect and Replace the Charcoal Canister

1. Locate the charcoal canister; it is typically found near the fuel tank.
2. Disconnect the hoses and electrical connectors from the canister.
3. Remove the mounting bolts and take out the canister.
4. Install the new canister by reversing the removal steps, ensuring all connections are tight.

5. Test the Purge and Vent Valves

1. Locate the purge valve and vent valve in the EVAP system.
2. Use a multimeter to check the electrical connections for continuity.
3. If either valve is faulty, replace them with OEM parts.
4. Reconnect the electrical connectors securely.

6. Reconnect Battery and Clear Codes

1. Reconnect the negative battery terminal.
2. Use the OBD-II scanner to clear the P0456 code.
3. Start the engine and let it idle for a few minutes.