Ignition and misfires code · Dallas-Fort Worth area, Texas
P0300 repair cost in Dallas
P0300 means random or multiple cylinder misfires. In the Dallas-Fort Worth area, Texas, the most common fix, spark plug replacement, has a typical range of $80 to $500.
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $20 | $120 |
| Labor: 0.6 to 2.5 hours × $105 to $145 an hour | $63 | $363 |
| Fees: shop supplies, disposal, diagnostics | $0 | $15 |
| Total, rounded | $80 | $500 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in Dallas, $26.81 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 Dallas is different
The parts cost about the same everywhere. The labor rate is what changes. Auto technicians in the Dallas-Fort Worth area, Texas earn an average of $26.81 an hour, so a shop there bills roughly $105 to $145 an hour. That moves this repair's total, and the range above already includes it.
Same repair in other areas
| Area | Typical range, estimate |
|---|---|
| Boston area, Massachusetts | $95 to $580 |
| New York City area | $90 to $550 |
| Los Angeles area, California | $90 to $560 |
| Chicago area, Illinois | $85 to $530 |
| Houston area, Texas | $80 to $500 |
| Phoenix area, Arizona | $85 to $510 |
| Atlanta area, Georgia | $85 to $530 |
| Miami area, Florida | $80 to $510 |
| Seattle area, Washington | $95 to $560 |
What the code means, causes and what to check first are on the P0300 page.
Not a repair shop, estimates only. Typical range, estimate. Prices updated October 2026.