Replacing Your Honda Fuel Cap: A Step-By-Step Guide

If you're experiencing issues with your Honda's fuel cap, you're not alone. Many Honda owners have reported problems with the fuel cap, ranging from a loose cap to a broken tether. In some cases, the issue may be caused by a faulty rubber seal, which can cause fuel vapour leaks. Other issues could be related to the EVAP system, which controls emissions. If you're handy, you may be able to replace the fuel cap yourself, but it's important to get the correct replacement cap for your vehicle's make and model. Non-genuine Honda caps may not fit properly and could lead to further issues. If you're unsure, it's best to consult a mechanic or a Honda-authorised repair centre.

Removing the gas cap tether

To remove the gas cap tether on a Honda, you will need to remove the pin that holds the old strap in place. This is usually a small, black, plastic pin located on the bottom left of the gas cap.

Firstly, try prying up on the pin from the bottom, where the tether attaches to the fuel filler door. You can use a long, thin object, such as the head of a finishing nail, to push up on the pin. Be careful not to break the pin as you may need to reuse it.

If prying does not work, you may need to use a small tool to gently lift and remove the pin. This will detach the tether from the gas cap, allowing you to replace it with a new one.

It is worth noting that some Honda models may require you to purchase a whole new gas cap if the tether is broken, as the tether may not be sold separately. However, there are also reports of people finding aftermarket replacements for the tether online.

Replacing a capless fuel filler

The capless shutter set consists of two pieces: the external cap that you see when filling up your tank, and the internal white piece that covers the filler tube and seals the gas tank.

Step 1: Identify the piece that needs replacing

If you've damaged the external part, you will need to replace it with the Honda part 17671-TBA-A02. If you've damaged the internal part, you will need to purchase a complete shutter set, Honda part 17060-TBA-L02.

Step 2: Remove the external cap

First, remove the liner surrounding the cap by pulling it off. Then, break off the six plastic tabs holding the cap in place (marked by red arrows in the image). After breaking the tabs off, unlock the cap by inserting a flat-head screwdriver into the top slot (marked by a green arrow in the image) and bending the cap up slightly. Finally, pull the cap off.

Step 3: Remove the internal cap

If you only need to replace the external cap, skip to Step 4.

To remove the internal cap, you will need an automotive pick and something wide and thin enough to fit and span the tabs of the white shutter assembly (such as a wide chisel). First, flip down the flapper and use the pick tool to lift up the latch. Then, insert the wide tool into the tabs and turn the shutter clockwise before pulling it out.

Step 4: Install the new cap(s)

If you are just replacing the external cap, grab your replacement part and push it back on. If you have replaced the internal cap as well, push the new external cap back on.

Note: This guide is based on a Honda Odyssey forum post and is provided for informational purposes only. It is important to exercise caution and consult a certified mechanic before attempting any vehicle repairs or maintenance.

Fixing a broken fuel cap

Identify the Issue

First, identify the problem with your fuel cap. Common issues include a loose fuel cap, a broken or damaged cap, a stuck cap, or a faulty fuel door.

Troubleshooting

If the fuel cap is loose, ensure it is tightened securely. Grasp the cap firmly and turn it clockwise until you hear a clicking sound.

If the fuel cap is stuck and won't open, locate and press the emergency fuel cap button, usually found next to the gas tank side of the trunk. Pull the lever to release the fuel cap.

For a faulty fuel door, troubleshoot the issue. The problem could be a broken internal spring, a faulty lever, a bent fuel door, or a lack of lubrication in the door's spring.

Inspect the Fuel Cap

If the troubleshooting steps do not resolve the issue, inspect the fuel cap for cracks or damage. Remove the fuel cap by turning it counterclockwise and check the rubber seal for any wear or cracks.

Replace the Fuel Cap

If the fuel cap is damaged or the rubber seal is compromised, you will need to replace the fuel cap. Purchase a genuine Honda replacement cap that fits your vehicle's make and model. Non-genuine caps may not fit properly and can cause issues.

Install the New Fuel Cap

To install the new fuel cap, ensure the fuel door is closed. Tighten the cap securely until you hear at least three clicks, indicating it is fully inserted.

Test the Fuel Cap

After replacing the fuel cap, test it by driving your vehicle for a few dozen miles. The 'Check Fuel Cap' indicator light should turn off after a while. If the light persists, there may be another issue, and you should consult a technician.

Additional Considerations

• If you have a capless fuel filler, removing the inner and outer parts may require special tools and adapters.
• Fuel caps with tethers may require replacing the entire cap if the tether breaks, as it is challenging to find aftermarket replacements for the tether alone.
• Always refer to your Honda owner's manual for specific instructions and safety precautions.

By following these steps, you can effectively fix a broken fuel cap on your Honda vehicle, ensuring a proper seal for your fuel tank and preventing further issues.

Resetting the 'Check Fuel Cap' message

If you're seeing the 'Check Fuel Cap' message on your Honda Accord, there are a few things you can do to reset it. Firstly, check that the fuel cap is correctly secured—it should be tightened until you hear a clicking sound. If the cap is loose, broken, or missing, this could be the cause of the message. If the cap is damaged, you may need to replace it with a new one, ensuring it is the correct make and model for your vehicle. Non-genuine Honda caps may not function properly and cause issues.

If the cap is secure and the message is still showing, try the following steps:

• Turn off the engine.
• Open the fuel door.
• Check that the cap is securely fastened.
• Restart the car.

If the issue persists, you may need to take your car to a Honda-authorised repair centre for further diagnosis and repair.

Checking for a faulty purge valve

To further diagnose the issue, you can use an OBD-II scanner to retrieve specific trouble codes associated with the EVAP system. Codes such as P0443 or P0445 often indicate canister purge valve issues in Hyundai vehicles, while a P0456 code could point to a bad EVAP purge valve.

Additionally, you can perform a visual inspection of the purge valve and its connecting hoses. Look for signs of damage, wear, or disconnected hoses. If there are visible issues, address them promptly to prevent further damage to the valve.

Another method is to perform a vacuum test using a handheld vacuum pump. Apply vacuum pressure to the valve, and if it fails to hold the vacuum, it may be faulty and need replacement. This test can be done with the valve connected or disconnected from the vehicle.

It is important to note that a faulty purge valve may lead to decreased fuel efficiency and increased emissions. If you notice that you are refuelling more frequently or see an unusual amount of smoke from the exhaust, it is advisable to inspect the EVAP system, including the canister purge valve.

Frequently asked questions