Parts for your 2006 Honda Elysion-Fuel cap

2006 Honda Elysion Fuel Cap — Purpose, Care, and Replacement

For the 2006 Honda Elysion, a conventional screw-type fuel filler cap is fitted and very much relevant. Honda’s JDM Owner’s Manual for the Elysion (2004–2008) instructs drivers to tighten the cap until it “clicks,” and the Honda Electronic Parts Catalogue (EPC) lists a dedicated “CAP, FUEL FILLER” for the RR1–RR4 Elysion variants. Honda service literature for the EVAP (evaporative emissions) system also notes that an improperly sealed cap can trigger EVAP leak-related DTCs (e.g., P0440/P0442/P0456). In short, this model does not use a capless system, it relies on a proper, sealing fuel cap.

On this Elysion, the fuel cap’s job is simple but critical. It seals the tank to stop petrol vapour escaping, keeps dust and water out of the filler neck, and helps the EVAP system do its thing—capturing fumes in the charcoal canister and maintaining the correct pressure. A dodgy or loose cap can lead to a petrol odour, a Check Engine Light after refuelling, and even small fuel economy drops.

As part of routine servicing, the cap deserves a quick once-over. Owners should check that the ratcheting mechanism tightens and “clicks,” inspect the rubber sealing ring for cracks or flattening, and make sure the tether is intact so the cap doesn’t get misplaced at the servo. Wipe the sealing surfaces with a clean, lint-free cloth—especially if the vehicle does a lot of dusty kays around Aus or NZ. Avoid petroleum-based lubricants on the seal, if it’s perished, replace the cap rather than trying to revive it.

There’s no fixed replacement interval from Honda, but a genuine or high-quality equivalent cap should be fitted if any of the following show up:

• Persistent fuel smell around the left-rear quarter or after-fill
• Check Engine Light with EVAP small-leak codes (e.g., P0456)
• Cap won’t “click,” is hard to start threading, or the gasket looks cracked

When refuelling, open the fuel door, remove the cap and hang it by the tether, fill with the correct octane petrol, then refit the cap until it clicks at least three times. Don’t overfill once the pump clicks off—overfilling can saturate the charcoal canister and upset EVAP operation. Keeping the filler area clean and the cap sealing properly helps the Elysion run sweetly, avoids nuisance warning lights, and prevents vapour loss that’s rough on the environment and the wallet.

Popular questions about the 2006 Honda Elysion fuel cap

What type of fuel cap does the 2006 Honda Elysion use?
It uses a standard, screw-on, non-vented cap with a tether and a ratcheting “click” feature. This design works with the Elysion’s EVAP system to keep petrol vapour sealed and emissions in check.

Why did the Check Engine Light come on after refuelling?
Often it’s because the cap wasn’t tightened enough or the seal is worn. Tighten until it clicks several times. If the light persists, check the cap’s gasket and replace it if damaged, then clear codes after confirming the seal.

How often should the fuel cap be replaced?
There’s no set interval. Replace it when the seal is cracked, the cap no longer clicks, threads feel rough, there’s a persistent fuel smell, or you’re chasing recurring EVAP leak codes.