What Does P1462 Mean?
The EVAP system has detected a gross leak or complete absence of flow during a leak test. This indicates a large vapor leak that allows fuel vapors to escape to atmosphere instead of being captured and burned.
Common Causes
35%
Missing, loose, or damaged fuel cap
30%
Cracked or disconnected EVAP hoses or lines
20%
Failed EVAP purge valve stuck open
15%
Leaking charcoal canister or canister vent valve
Diagnostic Steps
1
Step 1: Inspect and tighten fuel cap, check cap seal for damage or wear
2
Step 2: Visually inspect all EVAP hoses and connections for cracks, disconnections, or damage
3
Step 3: Perform smoke test on EVAP system to locate gross leak source
4
Step 4: Test purge valve operation and verify it closes properly when commanded
5
Step 5: Inspect charcoal canister and vent valve for physical damage or saturation
Estimated Repair Cost
$50 - $600
Parts + labor, varies by vehicle and location
The EVAP system has detected a gross leak or complete absence of flow during a leak test. This indicates a large vapor leak that allows fuel vapors to escape to atmosphere instead of being captured and burned.
The most common cause of P1462 (Evap Emission Control Sys Leak Detected (Gross Leak/No Flow)) is: Missing, loose, or damaged fuel cap
Typical repair costs for P1462 range from $50 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but fails emissions standards and wastes fuel. May cause fuel smell inside or outside vehicle.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1462 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Manufacturer
Recommended Tools
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