Acura Error Code P0455: How to Fix It
Medium 1-2 hours Low Severity
Verified June 2026
- Error Code
- P0455
- Brand
- Acura
- Product Type
- automotive
- Severity
- Low
- DIY Difficulty
- Medium
- Estimated Fix Time
- 1-2 hours
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Tools You'll Need
- OBD2 code scanner
- Basic hand tools
- Flashlight
- Jack and jack stands (if needed)
- Shop rags
How to Fix Error Code P0455
-
Connect OBD2 scanner and verify the code
Ensure the vehicle is parked on level ground and the engine is cool before beginning diagnosis. -
Visually inspect the gas cap
-
Check EVAP system vacuum hoses
Do not smoke or use open flames when inspecting fuel system components. -
Inspect the charcoal canister
Use jack stands if you need to raise the vehicle. Never rely solely on a jack for support. -
Test the purge valve
-
Clear codes and test drive
Parts You May Need
Gas cap
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EVAP vacuum hoses
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EVAP purge valve
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EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
Gas cap
Check Price on Amazon
EVAP vacuum hoses
Check Price on Amazon
EVAP purge valve
Check Price on Amazon
EVAP charcoal canister
Check Price on Amazon
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When to Call a Professional
Contact a certified mechanic if you cannot locate the leak after following these steps, if the leak is in the fuel tank itself, or if you're not comfortable working around fuel system components. Professional smoke testing equipment may be needed to find small leaks.Frequently Asked Questions
Can I drive my Acura with P0455 error code?
Yes, you can continue driving with P0455 as it doesn't pose immediate safety risks. However, your vehicle may fail emissions testing and fuel economy may be slightly reduced. Address the issue promptly to prevent potential damage to other EVAP components.
How much does it cost to fix P0455 in an Acura?
Repair costs vary widely depending on the cause. A loose or damaged gas cap costs $10-30 to replace. EVAP hoses cost $20-50. A faulty purge valve ranges from $80-200 including labor. More complex issues like charcoal canister replacement can cost $200-500.
Will P0455 cause my Acura to fail inspection?
Yes, P0455 will typically cause your vehicle to fail emissions testing in states that require it. The error must be resolved and the check engine light turned off before passing inspection.
How often should I replace my Acura's gas cap?
Gas caps typically last 5-7 years under normal conditions. Replace it if you notice cracks in the rubber seal, the cap doesn't click when tightened, or if it's damaged. A quality replacement cap costs $15-30.