how to fix the EVAP system leak in my Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0440, P0455

3 min read

584 words

Problem Statement

Learn how to diagnose and fix EVAP system leaks in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0440, P0455

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components
•Allow the engine to cool before inspecting or replacing components near the engine

Symptoms

•Check engine light illuminated
•Fuel odor near the vehicle
•Poor fuel economy
•Failed emissions test
•Hissing noise from the fuel tank area

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific EVAP-related codes
2
Inspect the gas cap for cracks or improper sealing; replace if necessary
3
Visually inspect EVAP lines and hoses for any signs of damage or wear
4
Use a smoke machine to test for leaks in the EVAP system
5
Check the EVAP purge valve and vent valve for proper operation and any obstructions
6
Inspect the canister for cracks or blockages

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Pliers
•Socket set
•Smoke machine

Parts Required

•New gas cap (if damaged)
•EVAP hoses (if damaged)
•EVAP purge valve (if faulty)
•EVAP canister (if damaged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific EVAP-related codes
2
Inspect the gas cap for cracks or improper sealing; replace if necessary
3
Visually inspect EVAP lines and hoses for any signs of damage or wear
4
Use a smoke machine to test for leaks in the EVAP system
5
Check the EVAP purge valve and vent valve for proper operation and any obstructions
6
Inspect the canister for cracks or blockages

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and ensure the engine is off and cool.

2. Inspect and Replace the Gas Cap

Tools Required: None required for inspection; a new gas cap if replacing.
Inspect the gas cap for cracks or damage.
If the gas cap is faulty, remove the old cap and replace it with a new one. Ensure it clicks securely into place.

3. Repair or Replace EVAP Hoses

Tools Required: Pliers, socket set.
Identify damaged hoses during the visual inspection.
Using pliers, disconnect the damaged hoses from their connections.
Measure and cut new hoses to the appropriate length, ensuring they are compatible with the vehicle.
Connect the new hoses, making sure they fit snugly and securely.

4. Replace the EVAP Purge Valve

Tools Required: Socket set, screwdriver.
Locate the EVAP purge valve, typically found near the engine or intake manifold.
Disconnect the electrical connector and hose connected to the purge valve.
Use a socket to remove the mounting bolts and take out the old valve.
Install the new purge valve by reversing the removal steps, ensuring proper alignment and tightness.

5. Replace the EVAP Canister (if damaged)

Tools Required: Socket set, pliers.
Locate the EVAP canister, usually found under the vehicle near the fuel tank.
Disconnect the hoses and electrical connectors attached to the canister.
Remove the mounting bolts securing the canister to its bracket.
Install the new canister by reversing the disassembly steps and ensuring all connections are secure.