Ignition and misfires code · Los Angeles area, California
P0300 repair cost in Los Angeles
P0300 means random or multiple cylinder misfires. In the Los Angeles area, California, the most common fix, spark plug replacement, has a typical range of $90 to $560.
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 × $120 to $170 an hour | $72 | $425 |
| Fees: shop supplies, disposal, diagnostics | $0 | $15 |
| Total, rounded | $90 | $560 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in Los Angeles, $30.61 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 Los Angeles is different
The parts cost about the same everywhere. The labor rate is what changes. Auto technicians in the Los Angeles area, California earn an average of $30.61 an hour, so a shop there bills roughly $120 to $170 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 |
| Chicago area, Illinois | $85 to $530 |
| Houston area, Texas | $80 to $500 |
| Dallas-Fort Worth 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.