P0455
Evaporative Emission Control System Leak Detected (Gross Leak)
Description
Evaporative Emission Control System Leak Detected (Gross Leak). This powertrain diagnostic trouble code covers the engine, the fuel and ignition systems, emission control and the transmission.
OBD Codes Details
Possible Causes
Failed catalytic converter, leaking EVAP hoses or purge valve, clogged EGR passages, faulty oxygen sensor
Solution
Check upstream and downstream oxygen sensor readings, smoke-test the EVAP system, inspect the EGR passages and valve, evaluate catalyst efficiency
Symptoms
- Check engine light illuminated
- Noticeable fuel odor around the vehicle
- Fuel cap loose, missing, or not sealing
- Failed emissions test
- No major drivability symptoms in most cases
Diagnostic Recommendations
- Check fuel cap first for a loose or missing seal
- Inspect EVAP hoses and canister for disconnection or damage
- Perform a smoke test to pinpoint the large leak
- Test purge and vent solenoid operation
- Inspect fuel tank and filler neck for damage
Repair Cost Estimate
- Fuel cap replacement: $20-50
- Smoke test diagnostic: $80-150
- EVAP canister replacement: $200-500
- EVAP hose/component repair: $100-350
- Total diagnostic and repair: $150-900
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Fact-checking completed
Verified by:
Pavel Volkov
Created:
Information verified against official sources
Official Sources
Society of Automotive Engineers
Official OBD-II diagnostic trouble codes standard (SAE J2012)
Automotive engineering standards organization
International Organization for Standardization
International standard for vehicle diagnostic systems
International standards for automotive diagnostics
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