P0455 on HYUNDAI SONATA — EVAP System Leak Detected - Large Leak

Q: "What does P0455 mean on a HYUNDAI SONATA?"

"P0455 indicates: EVAP System Leak Detected - Large Leak. This is a emission controls code. 2 HYUNDAI SONATA owners have reported this to NHTSA."

Q: "What are the most common causes of P0455 on HYUNDAI SONATA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Unknown Or Other,Fuel/Propulsion System, Power Train. These percentages are based on the component field in owner complaints."

Q: "Is P0455 serious on my HYUNDAI SONATA?"

"Of 2 NHTSA reports for this code on HYUNDAI SONATA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HYUNDAI SONATA shows P0455?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0455 Means on Your HYUNDAI SONATA

P0455 is a diagnostic trouble code indicating: EVAP System Leak Detected - Large Leak. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 HYUNDAI SONATA owners have reported this issue to NHTSA across model years 2011-2016. Most reports come from the 2011, 2016 model years. The most commonly reported component is Unknown Or Other,Fuel/Propulsion System (50.0% of reports).

Real HYUNDAI SONATA Owner Reports

Source: NHTSA Complaints Database

"7/19 bought my 2011 sonata then two days later check engine light came on. took to dealership they said gas cap was loose and if it came back on to bring back in. 2 weeks later went to gas station, came back out car wouldnt start. no click or anything. all power worked as well."

— 2011 HYUNDAI SONATA owner · UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM · Filed 06/21/2019

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'11

1

'16

Common Causes on HYUNDAI SONATA

Based on NHTSA complaint component analysis for this vehicle.

UNKNOWN or OTHER,FUEL/PROPULSION SYSTEM 50%

POWER TRAIN 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0455 mean on a HYUNDAI SONATA? ▾

P0455 indicates: EVAP System Leak Detected - Large Leak. This is a emission controls code. 2 HYUNDAI SONATA owners have reported this to NHTSA.

What are the most common causes of P0455 on HYUNDAI SONATA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Unknown Or Other,Fuel/Propulsion System, Power Train. These percentages are based on the component field in owner complaints.

Is P0455 serious on my HYUNDAI SONATA? ▾

Of 2 NHTSA reports for this code on HYUNDAI SONATA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HYUNDAI SONATA shows P0455? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.