Emissions code · Boston area, Massachusetts
P0456 repair cost in Boston
P0456 means very small fuel vapor leak. In the Boston area, Massachusetts, the most common fix, gas cap replacement, has a typical range of $5 to $110. Usually yes, for now.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $8 | $40 |
| Labor: 0 to 0.3 hours × $125 to $175 an hour | $0 | $53 |
| Fees: shop supplies, disposal, diagnostics | $0 | $10 |
| Total, rounded | $5 | $110 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in Boston, $31.54 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
Why Boston is different
The parts cost about the same everywhere. The labor rate is what changes. Auto technicians in the Boston area, Massachusetts earn an average of $31.54 an hour, so a shop there bills roughly $125 to $175 an hour. That moves this repair's total, and the range above already includes it.
Same repair in other areas
| Area | Typical range, estimate |
|---|---|
| New York City area | $5 to $100 |
| Los Angeles area, California | $5 to $110 |
| Chicago area, Illinois | $5 to $100 |
| Houston area, Texas | $5 to $95 |
| Dallas-Fort Worth area, Texas | $5 to $95 |
| Phoenix area, Arizona | $5 to $95 |
| Atlanta area, Georgia | $5 to $100 |
| Miami area, Florida | $5 to $95 |
| Seattle area, Washington | $5 to $110 |
What the code means, causes and what to check first are on the P0456 page.
Not a repair shop, estimates only. Typical range, estimate. Prices updated October 2026.