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P0455

Ford Explorer GuideLow Severity

P0455 on Ford Explorer: Symptoms, Causes & DIY Fix

Official technical diagnostic wire for fault code P0455 (P0455: Evaporative Emission Control System Leak Detected (Gross Leak)) specifically affecting Ford Explorer vehicles equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

DIY Parts Estimate

$15 - $250 (DIY: $15 - $50)

Explorer Direct Fit

Shop Labor Quote

$180 – $380

Based on $120/hr labor

Drivability Status

Drivable (Short Trip)

Low urgency level

Est. DIY Time

45 – 90 Min

Basic hand tools

Check P0455 On Another Ford Model:

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1. Symptoms of P0455 on Ford Explorer

When the Engine Control Module (ECM/PCM) on your Ford Explorer (2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP)) logs fault code P0455, drivers commonly observe:

Check Engine Light on on Ford Explorer (2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP))

Gas cap loose warning message on dashboard on Ford Explorer (2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP))

Slight fuel vapor odor near rear of vehicle on Ford Explorer (2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP))

Ford Explorer OBD-II Port Location

The 16-pin diagnostic connector is located Lower steering column dash trim. Plug in your scan tool to verify freeze-frame sensor values.

2. Most Likely Causes on Ford Explorer

Historical warranty claims and technical repair bulletins for Ford Explorer point to the following failure distribution:

55%

Missing, loose, or cracked gas cap seal (Ford OEM Part)

25%

Faulty EVAP purge control solenoid (Ford OEM Part)

12%

Stuck open EVAP vent valve (Ford OEM Part)

Cracked EVAP charcoal canister vapor hose (Ford OEM Part)

3. Step-by-Step DIY Repair Guide for Ford Explorer

Inspect and Tighten the Gas Cap

Remove gas cap, inspect rubber O-ring for cracks, tighten until it clicks 3 times. on the Ford Explorer equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

Required Tool: None

Replace Gas Cap with OEM Replacement

If the cap rubber is dried or cracked, replace with genuine OEM cap ($15). on the Ford Explorer equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

Required Tool: New OEM Gas Cap

Test EVAP Purge Solenoid Under Hood

Disconnect electrical plug and vacuum hose. Apply 12V; verify valve seals tight when unpowered. on the Ford Explorer equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

Required Tool: 12V Probe, Vacuum Pump

Inspect EVAP Canister Vent Valve Near Gas Tank

Check vent valve for road salt corrosion or spider nest clogs. on the Ford Explorer equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

Required Tool: Flashlight, Jack Stands

Smoke Test EVAP System

Pump mineral oil smoke into EVAP port to reveal any hairline cracked lines. on the Ford Explorer equipped with 2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP).

Required Tool: EVAP Smoke Machine

4. Ford Explorer P0455 FAQs

What causes code P0455 to trigger on a Ford Explorer?

On the Ford Explorer (2.3L EcoBoost 4-Cyl (300HP) / 3.0L Twin-Turbo EcoBoost V6 (ST 400HP)), P0455 is most frequently caused by Missing, loose, or cracked gas cap seal or Faulty EVAP purge control solenoid. Factory sensor degradation or wiring harness wear near the engine bay are common factors.

Can I safely drive my Ford Explorer with code P0455?

Yes. Completely safe to drive, but emissions test will fail. Given that P0455 carries a Low severity rating on Ford vehicles, we advise performing diagnostic scanning via the OBD-II port located lower steering column dash trim before extended highway driving.

Where is the diagnostic port located on the Ford Explorer?

The 16-pin OBD-II DLC connector on the Ford Explorer is situated lower steering column dash trim. It requires no special tools to plug in a standard scanner.

How much does it cost to fix P0455 on a Ford Explorer?

DIY replacement parts typically range between $15 - $250 (DIY: $15 - $50). If serviced at an authorized Ford dealership, expect an additional $120–$250 in professional labor based on their $120/hr hourly rate.