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

Learn how to diagnose and fix P0456 fuel system issue in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Gas Cap

• Tools Required: None specific, but a socket set may be needed for other steps.
• If the gas cap is damaged:
  1. Remove the old gas cap from the filler neck.
  2. Install a new, OEM-spec gas cap ensuring it clicks into place securely.

3. Inspect and Replace EVAP Hoses

• Tools Required: Pliers, knife (if cutting new hose).
• If any hoses are found damaged:
  1. Remove the damaged hose by loosening clamps or cutting it.
  2. Measure and cut a new hose to the same length.
  3. Install the new hose, ensuring it fits snugly and secure with clamps.

4. Check and Replace the EVAP Purge Valve

• Tools Required: Socket set, possibly a screwdriver.
• If the purge valve is faulty:
  1. Locate the EVAP purge valve (typically near the intake manifold).
  2. Disconnect the electrical connector.
  3. Remove the mounting bolts and take out the old valve.
  4. Install the new purge valve and reconnect the electrical connector.

5. Perform a Smoke Test

• Tools Required: Smoke machine.
• If leaks are suspected in the system:
  1. Connect the smoke machine to the EVAP service port.
  2. Introduce smoke and inspect for any visible smoke escaping, indicating a leak.
  3. Seal any identified leaks and recheck with the smoke machine.

6. Reconnect Battery and Clear Codes

• After repairs:
  1. Reconnect the battery and secure any loose connections.
  2. Use the OBD-II scanner to clear the P0456 code.
  3. Start the engine and monitor for reoccurrence of the code.