P0455: Evaporative Emission Control System Leak Detected (Gross Leak)
22 vehicles · 11 makes · $20-$2,500 repair
Most Reported On
P0455 is an OBD-II diagnostic trouble code meaning “Evaporative Emission Control System Leak Detected (Gross Leak).” A large leak has been detected in the EVAP system. More severe than P0442. Often a missing or very loose gas cap. This code is most commonly reported on 2011-2023 Chrysler 300, 2007-2014 Toyota FJ Cruiser, and 2016-2023 Toyota Tacoma, plus 19 other vehicles, with repair costs ranging from $20 to $2,500.
Common Causes
Typical Repair Cost
Based on 24 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0455, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (22)
Fuel Line Corrosion and Leak Near Rear Wheel
EVAP Vent Solenoid Clogging With Dust/Water Causing Check Engine Light and Hard Refueling
EVAP Vent Valve and Charcoal Canister Dust Ingestion Causing Check Engine Light and Hard Refueling
Rear A/C System Failure
Fuel Filler Neck Corrosion and Rust-Through Triggering EVAP Leaks and Fuel Smell
EVAP Vent Control Valve / Charcoal Canister Faults Triggering Check Engine Light and Hard Refueling
EVAP Canister and Vent Control Valve Failure Triggering Check Engine Light
A/C Compressor and Evaporator Failure
A/C Musty/Mold Smell
Evaporative Emissions Leak Faults from Charcoal Canister, Vent Valve, or Filler Neck Corrosion
EVAP Charcoal Canister / Vent Valve Failure Triggering Check Engine Light
EVAP Charcoal Canister and Vent Valve Failure Causing Check Engine Light
EVAP Charcoal Canister / Vent Valve Failure Triggering Check Engine Light and Refueling Vapor Issues
FAQ
What does P0455 mean?
P0455 stands for "Evaporative Emission Control System Leak Detected (Gross Leak)." A large leak has been detected in the EVAP system. More severe than P0442. Often a missing or very loose gas cap.
What are the most common causes of P0455?
The most common causes of P0455 are: Missing gas cap, Cracked EVAP hose, Disconnected EVAP line, Cracked charcoal canister, Failed purge or vent valve stuck open. The specific cause varies by vehicle.
How much does it cost to fix P0455?
Repair costs for P0455 range from $20 to $2,500, depending on the vehicle and root cause.
Which vehicles are affected by P0455?
Au7o has documented P0455 across 22 vehicle models from 11 manufacturers: Chevrolet, Chrysler, Dodge, Ford, Hyundai, Infiniti, Kia, Mazda, Nissan, Subaru, Toyota.
Sources (12)
- ForumReddit r/ToyotaTacoma thread discussing musty smell in 2016 Tacoma A/C
- ForumMazdas247 Forum - 2006 Mazda5 A/C evaporator leak / dash removal discussion
- owner-reportHHR Fuel Line Corrosion Issue - ChevroletProblems.com
- ForumOwner forum discussions on rusted Ranger fuel tank straps and filler neck replacement
- ForumTacomaWorld - EVAP codes P0440/P0442/P0446 troubleshooting threads
- TSBGM bulletin for EVAP canister vent valve replacement and relocation on pickups/SUVs in dusty conditions
- ForumGM bulletin and service information addressing EVAP vent valve contamination on Colorado/Canyon platform
- NHTSANHTSA complaints for Chevrolet Colorado citing EVAP codes and inability to refuel normally
- ForumCarComplaints - Hyundai Elantra Fuel System and Emissions Complaints
- ForumToyota EVAP canister related service information / repair database references
- ForumToyotaNation forum discussions on RAV4 EVAP canister codes P0440/P0446 and canister replacement
- TSBNissan NTB/EC EVAP system diagnostic bulletins for Frontier/Xterra applications
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.