how to check for EVAP leaks in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0455, P0456

3 min read

526 words

Problem Statement

Learn how to diagnose and fix EVAP leaks in Ford Explorer 2011-2019. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Error Code

P0455, P0456

Affected Component

Fuel System

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components
•Ensure the smoke machine is used in a well-ventilated area to avoid inhaling smoke

Symptoms

•Check engine light illuminated
•Fuel odor around the vehicle
•Poor fuel economy
•Failed emissions test
•Increased tailpipe emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for EVAP-related codes
2
Inspect the gas cap for damage or improper sealing
3
Visually inspect all EVAP hoses and connections for cracks, wear, or disconnections
4
Conduct a smoke test to detect leaks in the EVAP system
5
Use a vacuum gauge to check for pressure loss in the system after a smoke test
6
Check the EVAP 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
•Smoke machine or EVAP leak tester
•Basic hand tools (screwdrivers, pliers, wrenches)

Parts Required

•Replacement gas cap (if defective)
•Replacement EVAP hoses (if damaged)
•Replacement EVAP canister (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for EVAP-related codes
2
Inspect the gas cap for damage or improper sealing
3
Visually inspect all EVAP hoses and connections for cracks, wear, or disconnections
4
Conduct a smoke test to detect leaks in the EVAP system
5
Use a vacuum gauge to check for pressure loss in the system after a smoke test
6
Check the EVAP canister for cracks or blockages

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery before working on electrical components.

2. Inspect and Replace Gas Cap

Tools Required: None
Sub-steps:
1. Remove the gas cap and inspect for damage or wear.
2. If damaged, replace with a new OEM gas cap that meets specifications.
3. Reattach the gas cap securely and listen for a click.

3. Smoke Test Procedure

Tools Required: Smoke machine or EVAP leak tester
Sub-steps:
1. Connect the smoke machine to the EVAP service port.
2. Activate the smoke machine to introduce smoke into the EVAP system.
3. Observe for smoke escaping from any EVAP hoses, connectors, or the canister.
4. Mark any visible leaks for repair.

4. Repair Visible Leaks

Tools Required: Hose clamps, replacement hoses (if needed)
Sub-steps:
1. Cut out damaged sections of hoses and replace with new hoses, ensuring proper fitment.
2. Secure all connections with hose clamps to prevent leaks.
3. If the EVAP canister is damaged, remove it by unbolting and disconnecting any associated electrical connectors.

5. Verification

Reconnect the battery.
Start the engine and allow it to reach operating temperature.
Use the OBD-II scanner to check if any new error codes appear.
Monitor the fuel system for several drive cycles to ensure the check engine light does not return.
Perform a visual inspection to confirm no smoke is escaping from the repaired areas.