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What An EVAP Leak Costs To Fix
A gas cap runs about $138 to $150 at RepairPal and a canister about $558 to $643. Most jobs land between those once the leak is found.
| Repair | Price | Source | What It Covers |
|---|---|---|---|
| Gas Cap | $138 to $150 | RepairPal | national average estimate, parts and labor |
| Purge Valve | $210 to $251 | RepairPal | national average estimate, parts and labor |
| Purge Valve | $323 to $380 | Kelley Blue Book | national average estimate, total |
| Purge Valve | $326.99 to $384.42 | Kelley Blue Book | average range from repair orders, total |
| Purge Valve | $36.95 to $65.52 | Supercanic (internal shop records) | shop parts invoices, parts only |
| Vent Valve | $182 | YourMechanic | vehicle specific estimate, parts and labor, 2011 Dodge Nitro |
| Vent Valve | $242 | YourMechanic | vehicle specific estimate, parts and labor, 2008 Chrysler PT Cruiser |
| Vent Valve | $239 | YourMechanic | vehicle specific estimate, parts and labor, 2015 Fiat 500 |
| Fuel Tank Pressure Sensor | $356 to $457 | RepairPal | national average estimate, parts and labor |
| Leak Detection Pump | $201 | YourMechanic | vehicle specific estimate, parts and labor, 2009 Dodge Charger |
| Leak Detection Pump | $391 | YourMechanic | vehicle specific estimate, parts and labor, 2012 Volkswagen Jetta |
| Leak Detection Pump | $210 | YourMechanic | vehicle specific estimate, parts and labor, 2012 Dodge Durango |
| Charcoal Canister | $558 to $643 | RepairPal | national average estimate, parts and labor |
| Filler Neck | $492 | YourMechanic | vehicle specific estimate, parts and labor, 2010 Toyota Camry |
| Filler Neck | $467 | YourMechanic | vehicle specific estimate, parts and labor, 2008 Chevrolet Express 2500 |
| Filler Neck | $248 | YourMechanic | vehicle specific estimate, parts and labor, 2009 Honda CR V |
| Smoke Test And Diagnosis | $61 to $90 | RepairPal | national average estimate, labor only |
| Smoke Test And Diagnosis | $169.99 to $184.99 | YourMechanic | mobile mechanic diagnostic fee by make |
Why The Numbers Differ
RepairPal and Kelley Blue Book publish national ranges, YourMechanic quotes one car at a time, and our own rows come from our invoices. Kelley Blue Book puts a purge valve at $323 to $380 while RepairPal says $210 to $251, so we show both. Our O'Reilly invoices show the purge valve part alone at $36.95 to $65.52 in 2026, which is shop cost and not a retail price.
Labor rates vary by city, and a diagnosis often comes first. Read what a check engine diagnostic costs.
By Anthony Limpert, co-founder of Supercanic in San Jacinto, California, a shop with ASE certified mechanics. Updated November 12, 2026.
Author Source EEAT Authors · Anthony's Author Page
Sources For This Page
- Gas Cap Replacement Cost Estimate, RepairPal, read 2026-11-12
- Purge Valve Replacement Cost Estimate, RepairPal, read 2026-11-12
- Purge Valve Replacement Costs, Kelley Blue Book, read 2026-11-12
- Here's How Much the Average Car Repair Now Costs, Kelley Blue Book, read 2026-11-12
- Supercanic shop invoices, Supercanic (internal shop records), read 2026-11-12
- Evaporation Vent Solenoid Replacement, YourMechanic, read 2026-11-12
- Fuel Evaporative Canister Replacement Cost Estimate, RepairPal, read 2026-11-12
- Fuel Tank Pressure Sensor Replacement Cost Estimate, RepairPal, read 2026-11-12
- Fuel Filler Neck Replacement, YourMechanic, read 2026-11-12
- Leak Detection Pump Replacement Service and Cost, YourMechanic, read 2026-11-12
- Emission System Diagnosis and Testing Cost Estimate, RepairPal, read 2026-11-12
- P0442 Trouble Code Help and Fix, YourMechanic, read 2026-11-12
Our Shop
Supercanic In San Jacinto
1685 S State St Suite D, San Jacinto, CA 92583. We test EVAP leaks with a smoke machine.