Last reported case: 15 years ago
Based on 7 owner reports, 7 from forums)
What is P0455?
P0455 indicates a large leak in your vehicle's evaporative emission control system, which prevents fuel vapors from being properly captured and can cause your check engine light to illuminate. This is a medium-severity issue that affects emissions compliance and may cause drivability problems if left unaddressed. The code is typically triggered when the system detects a significant vacuum leak, often from loose or damaged components in the fuel vapor recovery system.
Common Causes:
- Loose or damaged gas cap (most frequent initial check)
- Cracked or disconnected EVAP system hoses
- Faulty purge valve or vent valve
- Damaged charcoal canister or fuel tank
Symptoms:
- Check engine light illuminated (primary symptom)
- Fuel odor near the vehicle
- Failed emissions test
- Reduced fuel efficiency in some cases
🚗P0455 on 2012 JEEP Liberty
This page focuses specifically on P0455 issues reported by 2012 JEEP Liberty owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2012 JEEP Liberty Owners:
Parts Often Involved:
What Owners Say
Real experiences from 2012 JEEP Liberty owners
“Anybody have any ideas about what to check to fix this code? I was told to replace the evap purge solenoid, but before I spend $30 on one of those I'd like to know if anyone has any other ideas.”View original
“Well, I was getting ready to buy a hitch (need to pull the motorcycle to GA for a ride soon), and then my malfunction light comes on. I work at a tireshop and I asked the tech to run a diagnostic for me.”View original
“I have seen numerous people that take their Jeeps offroad hit the evap canister with rocks, logs, etc., and crack them. The two most common causes are split evap lines and loose gas caps.”View original
“Some of you may have seen my other post on LOST regarding this problem, but I thought I'd post here too just in case. Got a P0455 (Major Evap Leak) code a few months ago.”View original
“Autozone tech said it was probably a loose gas cap, but seeing as how its been a few weeks and not gone away, I'm sort of concerned. Just had the Jeep E-checked in late November and there did not seem to be any issues with gas cap pressure.”View original
“I just waited until inspection time (car won't pass inspection if throwing a code) and had the shop check into possible cause. They could not find anything either.”View original
“As stated, check the evap lines at the canister for splits, and also at the purge solenoid. These seem to be the two most common spots where the lines split.”View original
“Hey Folks, Got a check engine light a couple weeks ago and took my car to autozone to get it checked out. Diagnostic machine read: DTC (Codes) P0455 EVAP Emission Control System Leak (Large) DTC Pending (Codes) P0442 EVAP Emission Control System Leak (Small) Any ideas what could be wrong?”View original
“Monday when my tech gets back, Im gonna rack the KJ and see if I find anythings cracks. I know how much some of the parts cost and I get a slighty better price than customers on labor rates, but if I have to replace something under there, could i do it myself and would it save me some money to do it myself (with parts, lack of equipment, and beer)?”View original
“I'm getting this code. P0455 (Evaporative Emission (EVAP) System Leak Detected) Need to turn it off to get it smogged.”View original
These are real experiences shared by 2012 JEEP Liberty owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 7 discussions about P0455 from 2012 JEEP Liberty owners across automotive communities.
Success rate (0%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 4/11/2010