Parts for your 2013 Ford Falcon-Fuel cap

2013 Ford Falcon fuel cap

Based on the 2013 Ford Falcon (FG MkII) owner’s manual and Ford workshop literature for the FG platform, this model uses a conventional, screw-on fuel filler cap behind the exterior fuel flap. Ford documentation describes tightening the cap until it “clicks,” and the EVAP leak diagnostics reference a correctly sealing cap as part of the emissions system. Australian Design Rules for light-vehicle emissions (ADR 79 series) also assume a sealed evaporative system, which relies on a proper fuel cap. So, yes—on a 2013 Ford Falcon, the fuel cap is very much relevant and used.

On a 2013 Falcon, the fuel cap’s job is deceptively simple but critical. It seals the tank to keep dust, water, and road grime out, and it keeps petrol vapours in so the car’s evaporative emissions (EVAP) system can do its thing. A good cap helps prevent fuel smell around the left-rear quarter, wards off EVAP fault codes, and stops the car wasting vapour to the atmosphere. If the cap isn’t sealing or isn’t clicked tight, the Falcon can throw a check engine light and log small or large EVAP leak codes.

As part of routine servicing, it’s smart to give the cap a once-over. Check the rubber O-ring for hardening, cracks, or flat spots. Make sure the ratchet mechanism still clicks when tightened and the tether isn’t frayed. Wipe the filler neck with a clean, lint-free cloth so grit doesn’t chew up the seal. If the seal looks tired or the cap won’t click, replace it—there’s no set interval, but many owners see best results inspecting annually and swapping the cap whenever sealing is doubtful.

When replacing, use a cap that matches the Falcon’s EVAP specs—genuine or a quality equivalent for the FG/FG MkII petrol models. Fit it by turning clockwise until it clicks a few times, don’t force it past the clicks. Avoid lubricants on the seal, if it’s dry or deformed, just replace the cap. After refuelling, always confirm the click—this one habit can save chasing an EVAP warning down the track.

Note: Dedicated LPG EcoLPi Falcons have different refuelling hardware and a protective dust cap arrangement. Petrol Falcons use the standard screw-on petrol cap detailed above.

• Signs it’s time to replace: persistent fuel odour, failed click, cracked seal, EVAP leak codes (e.g., P0455/P0456).
• Quick care tip: keep the flap area clean and don’t blast the filler with high-pressure water.

Popular questions about 2013 Ford Falcon fuel caps

What fuel cap fits a 2013 Ford Falcon?
For petrol FG MkII Falcons, use a screw-on cap with a ratcheting “click” mechanism designed for the FG/FG MkII EVAP system. A genuine Ford cap or a quality aftermarket cap listed for BA–FG MkII compatibility will do the job. Dedicated LPG EcoLPi models use different refuelling hardware with a dust cap rather than a standard petrol cap.

Can a loose or faulty cap cause a check engine light?
Yes. If the cap isn’t sealed or tightened until it clicks, the EVAP system can detect a leak and switch on the warning lamp. After refuelling, re-seat and click the cap, then drive a few trips, the light often clears after the system re-tests. If the light stays on, the cap may need replacing or there may be another EVAP leak.

How often should the fuel cap be replaced?
There’s no fixed schedule. Inspect it at least yearly and replace it if the O-ring is perished, the cap won’t click, or there’s ongoing fuel odour or EVAP codes. Many owners end up replacing somewhere between 5–10 years depending on use and climate.