🔧 Tucson - Fuel Cap Replacement

Replacing your Tucson’s fuel cap is a quick job that helps prevent fuel vapors from escaping and can stop an EVAP-related check engine light caused by a loose or failing cap. You’ll remove the old cap, inspect the sealing area, and install a correct replacement cap that clicks tight.

Difficulty Level: Beginner | Estimated Time: 0.1-0.3 hours

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⚠️ Safety & Precautions

• ⚠️ Work in a well-ventilated area, away from flames, smoking, or sparks.
• ⚠️ Turn the engine OFF before opening the fuel door.
• ⚠️ If you smell strong fuel odor, stop and do not start the vehicle.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Clean microfiber towel
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel cap (EVAP-sealed, correct fit) - Qty: 1

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📋 Before You Begin

• Park on level ground and shift to Park.
• Turn the engine OFF and remove the key/fob from the vehicle.
• If the vehicle was just driven, wait 2–3 minutes before opening the cap area. Lets tank pressure stabilize.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the fuel door

• Use your hand to press/open the fuel door.
• Use a flashlight if it’s hard to see the cap area.

Step 2: Remove the old fuel cap

• Put on nitrile gloves.
• Turn the cap counterclockwise (left) until it releases.
• If you hear a soft hiss, that can be normal tank pressure releasing.
• If your cap has a tether (a small strap), let it hang without twisting it.

Step 3: Inspect and clean the sealing surfaces

• Use a flashlight to look at the filler neck rim (the round sealing edge).
• Wipe the rim with a clean microfiber towel to remove dust, grit, or fuel residue.
• Check the old cap’s rubber seal (gasket). If it’s cracked, flattened, or missing, replacement was needed.

Step 4: Install the new fuel cap

• Place the new cap onto the filler neck and turn it clockwise (right) by hand.
• Tighten until it clicks. Keep turning until you get at least 1–3 clicks (varies by cap design).
• Do not use tools to tighten—hand-tight only to avoid damaging the seal.

Step 5: Close the fuel door

• Close the fuel door firmly with your hand.
• Use the microfiber towel to wipe any spilled fuel if needed.

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✅ After Repair

• Start the engine and confirm there’s no fuel smell around the fuel door area.
• If you replaced the cap due to a check engine light, it may take a few normal drive cycles for the light to turn off on its own.
• If the light stays on after a few days of driving, the issue may be a leak elsewhere in the EVAP system (not just the cap).

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💰 DIY vs Shop Cost

Shop Cost: $40-$120 (parts + labor)

DIY Cost: $15-$45 (parts only)

You Save: $25-$75 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.3 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.