P0456 on JEEP WRANGLER — EVAP System Leak Detected (very small leak)

Q: "What does P0456 mean on a JEEP WRANGLER?"

"P0456 indicates: EVAP System Leak Detected (very small leak). This is a emission controls code. 2 JEEP WRANGLER owners have reported this to NHTSA."

Q: "What are the most common causes of P0456 on JEEP WRANGLER?"

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

Q: "Is P0456 serious on my JEEP WRANGLER?"

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

Q: "What should I do if my JEEP WRANGLER 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 JEEP WRANGLER

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.

2 JEEP WRANGLER owners have reported this issue to NHTSA across model years 2005-2007. Most reports come from the 2005, 2007 model years. The most commonly reported component is Fuel System, Gasoline (50.0% of reports).

Real JEEP WRANGLER Owner Reports

Source: NHTSA Complaints Database

"A large amount of fuel violently erupts from tank mouth when filling and overflows onto the vehicle, ground & myself. this occurs at each complete fill-up. this 2005 jeep wrangler sporadically trips obd-2 check engine codes for emission evaporative components, in the p0440-p0456 range."

— 2005 JEEP WRANGLER owner · FUEL SYSTEM, GASOLINE · Filed 01/06/2012

"Strong smell of gas in the garage after shutting jeep off for past 3-4 years. fuel spit issue resolved with warranty 12/2013. gas smell after shutting jeep off continued. 09/2014 dealership pulled code p0456, "vent tube at tank broken."

— 2007 JEEP WRANGLER owner · FUEL/PROPULSION SYSTEM · Filed 07/21/2016

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

📊 Complaint Trend by Model Year

1

'05

1

'07

Common Causes on JEEP WRANGLER

Based on NHTSA complaint component analysis for this vehicle.

FUEL SYSTEM, GASOLINE 50%

FUEL/PROPULSION SYSTEM 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 P0456 mean on a JEEP WRANGLER? ▾

P0456 indicates: EVAP System Leak Detected (very small leak). This is a emission controls code. 2 JEEP WRANGLER owners have reported this to NHTSA.

What are the most common causes of P0456 on JEEP WRANGLER? ▾

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

Is P0456 serious on my JEEP WRANGLER? ▾

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

What should I do if my JEEP WRANGLER 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.