Parts for your 2010 Ford Falcon-Fuel cap

2010 Ford Falcon fuel cap — what’s fitted and why it matters

Yes, the 2010 Ford Falcon uses a conventional, threaded fuel cap on petrol models, and the E-Gas LPG variant uses a specific LPG filler cap. This is supported by the Ford Falcon FG Series Owner’s Manual (2010) under “Fuel and refuelling,” the Ford Australia FG Workshop Manual procedures that begin with removing and refitting the fuel cap, and Ford’s Microcat/Genuine Parts catalogue listings for FG “Fuel Tank Cap” (petrol) and LPG filler caps. Australian Design Rules for evaporative emissions (ADR 79/02 and related) also necessitate a sealed cap on vehicles of this era, confirming the part is relevant and fitted on the 2010 Falcon.

On a 2010 Falcon, the fuel cap’s job is simple but important. It seals the tank to keep fumes in (and nasties out), helps the EVAP system keep emissions in check, and prevents fuel smell wafting out of the filler. It also keeps dust and water away from the filler neck — a big deal for anyone doing long country kays. Ford’s cap is vented to work with the car’s evaporative controls, so using the right spec cap matters.

As part of routine servicing, it’s worth giving the cap a quick once-over. Tighten it after refuelling until it clicks, if it won’t click or keeps backing off, it’s time for a new one. A loose or tired cap is a common trigger for a post-refuel check engine light and EVAP leak codes. Go genuine or a quality equivalent that’s compatible with unleaded/E10, LPG E-Gas models must use the correct LPG-style cap — they’re not interchangeable with petrol caps.

• Inspect the rubber seal/O-ring for cracks, flattening, or hardening.
• Check the tether isn’t broken, and that the cap threads are clean.
• Wipe the filler neck lip so the seal can do its job properly.
• If you smell fuel around the rear quarter, recheck the cap first.

Typical replacement intervals vary, but many owners find a cap lasts 5–10 years. If the cap’s damaged, missing, or won’t stay tight, replace it promptly to avoid fuel smells, dust ingress, and nuisance warning lights. For your Falcon, it’s a cheap, quick fix that keeps the EVAP system happy and the cabin free of fumes.

How tight should the 2010 Falcon’s fuel cap be?

Turn the cap clockwise until you feel resistance, then continue until it clicks. If it doesn’t click or keeps loosening, the internal ratchet or seal may be worn — replace the cap.

What are the signs a Falcon fuel cap needs replacing?

Fuel smell near the filler, a cap that won’t click or stay tight, visible cracks/hardening on the seal, or a check engine light soon after refuelling (often EVAP leak codes) point to a failing cap.

Is the petrol cap the same as the LPG E-Gas cap?

No. Petrol and LPG E-Gas Falcons use different caps and fittings. They aren’t interchangeable, so match the cap to your vehicle’s fuel system.