Engine code · Phoenix area, Arizona
P0128 repair cost in Phoenix
P0128 means engine not warming up fast enough. In the Phoenix area, Arizona, the most common fix, thermostat replacement, has a typical range of $100 to $420. Usually yes, for now.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $10 | $90 |
| Labor: 0.8 to 2 hours × $110 to $150 an hour | $88 | $300 |
| Fees: shop supplies, disposal, diagnostics | $10 | $25 |
| Total, rounded | $100 | $420 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in Phoenix, $27.56 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 Phoenix is different
The parts cost about the same everywhere. The labor rate is what changes. Auto technicians in the Phoenix area, Arizona earn an average of $27.56 an hour, so a shop there bills roughly $110 to $150 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 | $120 to $470 |
| New York City area | $110 to $450 |
| Los Angeles area, California | $110 to $460 |
| Chicago area, Illinois | $110 to $430 |
| Houston area, Texas | $100 to $410 |
| Dallas-Fort Worth area, Texas | $100 to $410 |
| Atlanta area, Georgia | $110 to $430 |
| Miami area, Florida | $100 to $420 |
| Seattle area, Washington | $120 to $460 |
What the code means, causes and what to check first are on the P0128 page.
Not a repair shop, estimates only. Typical range, estimate. Prices updated October 2026.