P0456 on VOLKSWAGEN PASSAT — EVAP System Leak Detected (very small leak)

Q: "What does P0456 mean on a VOLKSWAGEN PASSAT?"

"P0456 indicates: EVAP System Leak Detected (very small leak). This is a emission controls code. 3 VOLKSWAGEN PASSAT owners have reported this to NHTSA."

Q: "What are the most common causes of P0456 on VOLKSWAGEN PASSAT?"

"Based on 3 NHTSA reports, the most commonly cited components are: Fuel System, Gasoline,Power Train,Electrical System,Latches/Locks/Linkages,Vehicle Speed Control,Equipment, Unknown Or Other, Electrical System,Visibility,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0456 serious on my VOLKSWAGEN PASSAT?"

"Of 3 NHTSA reports for this code on VOLKSWAGEN PASSAT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my VOLKSWAGEN PASSAT shows P0456?"

"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 P0456 Means on Your VOLKSWAGEN PASSAT

P0456 is a diagnostic trouble code indicating: EVAP System Leak Detected (very small leak). This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

3 VOLKSWAGEN PASSAT owners have reported this issue to NHTSA across model years 2006-2015. Most reports come from the 2006, 2007 model years.

Real VOLKSWAGEN PASSAT Owner Reports

Source: NHTSA Complaints Database

"Check engine (mil) light turned on, car all of a sudden idles at a higher rpm while we were driving!!! vehicle was taken into the dealership."

— 2006 VOLKSWAGEN PASSAT owner · FUEL SYSTEM, GASOLINE,POWER TRAIN,ELECTRICAL SYSTEM,LATCHES/LOCKS/LINKAGES,VEHICLE SPEED CONTROL,EQUIPMENT · Filed 07/20/2011

"My engine light came on while driving as i noticed the engine louder than normal. i was out of town and was able to make it home safely. i took the vehicle in and had it tested and came up with a code of p0445, p0442 emissions small leak. i had the vehicle repaired that cost me $752.00."

— 2007 VOLKSWAGEN PASSAT owner · UNKNOWN OR OTHER · Filed 03/21/2015

"Tl* the contact owns a 2015 volkswagen passat. when the contact started the vehicle, the check engine warning indicator illuminated."

— 2015 VOLKSWAGEN PASSAT owner · ELECTRICAL SYSTEM,VISIBILITY,ENGINE · Filed 09/24/2017

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

📊 Complaint Trend by Model Year

1

'06

1

'07

1

'15

Common Causes on VOLKSWAGEN PASSAT

Based on NHTSA complaint component analysis for this vehicle.

FUEL SYSTEM, GASOLINE,POWER TRAIN,ELECTRICAL SYSTEM,LATCHES/LOCKS/LINKAGES,VEHICLE SPEED CONTROL,EQUIPMENT 33.3%

UNKNOWN or OTHER 33.3%

ELECTRICAL SYSTEM,VISIBILITY,ENGINE 33.3%

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 P0456 mean on a VOLKSWAGEN PASSAT? ▾

P0456 indicates: EVAP System Leak Detected (very small leak). This is a emission controls code. 3 VOLKSWAGEN PASSAT owners have reported this to NHTSA.

What are the most common causes of P0456 on VOLKSWAGEN PASSAT? ▾

Based on 3 NHTSA reports, the most commonly cited components are: Fuel System, Gasoline,Power Train,Electrical System,Latches/Locks/Linkages,Vehicle Speed Control,Equipment, Unknown Or Other, Electrical System,Visibility,Engine. These percentages are based on the component field in owner complaints.

Is P0456 serious on my VOLKSWAGEN PASSAT? ▾

Of 3 NHTSA reports for this code on VOLKSWAGEN PASSAT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my VOLKSWAGEN PASSAT shows P0456? ▾

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.