my Toyota Highlander Third Generation (2014-2019) has a P0442 code, what does that mean?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace the Fuel Cap

• Tools Required: None specific for this step.
• Check the condition of the fuel cap. If cracked or damaged, replace it with a new one.
• Ensure the new cap seals properly when installed.

3. Repair or Replace EVAP Hoses

• Tools Required: Pliers, socket set.
• Inspect each hose for wear or damage. If any hoses are cracked or disconnected, replace them.
• Use hose clamps to secure all connections tightly.

4. Inspect and Replace the EVAP Canister

• Tools Required: Socket set, ratchet.
• Locate the EVAP canister, typically found near the fuel tank.
• Remove the mounting bolts and disconnect any electrical connectors.
• Inspect the canister for damage or leaks. Replace it if necessary.

5. Test and Replace Purge Valve and Vent Valve

• Tools Required: Multimeter, socket set.
• Disconnect the purge valve and vent valve connectors.
• Test the functionality using a multimeter; replace any faulty valves.
• Reconnect the new or tested valves properly.