Emissions code
P1000: Emissions self-tests not finished yet
How much to fix P1000? Typically $55–$250.
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 | $0 | $0 |
| Labor: 0.5 to 1.5 hours × $110 to $150 an hour | $55 | $225 |
| Fees: shop supplies, disposal, diagnostics | $0 | $25 |
| Total, rounded | $55 | $250 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 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.
This is the range for the most common fix, diagnostic scan (check engine light). Which repair your car needs depends on a proper diagnosis.
This is not a fault. The computer runs several emissions self-tests after you drive, and this code means those tests have not all finished yet. It usually shows up after the battery was disconnected or replaced, codes were cleared, or the car has only done short trips.
- Safe to drive?
- Usually yes, for now
- Most common cause
- Battery recently disconnected or replaced
Safe to drive; the tests complete on their own after a mix of normal driving.
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What you may notice
- Check-engine light usually off
- Scan tool shows monitors not ready
- Failed readiness check at inspection
Common causes, most likely first
- Battery recently disconnected or replaced
- Codes just cleared
- Recent repair
- Short trips only
- Computer reset
Check this first
Drive normally for a week with both city and highway miles, and let the car sit overnight at least once so the cold-start tests can run. Avoid disconnecting the battery again, since that resets the tests.
Other repairs that sometimes fix P1000
| Repair | Typical range, US |
|---|---|
| Gas cap replacement | $5 to $95 |
| EVAP purge valve replacement | $80 to $240 |
| Battery replacement | $150 to $470 |
Before you pay
- Ask the shop what test showed this part is the cause, not just that the code appeared.
- Ask for parts and labor listed separately, and for the hours.
- Ask for a written OK before any extra work. Many states require written authorization before repairs.
Got a quote already? Check it against the range. Want to see if your car has a recall tied to this problem? Check recalls by VIN.
Need to read a code yourself? OBD-II scanners on eBay (affiliate link, disclosure).
P1000 questions
Is P1000 an actual problem?
No. It is a status note saying the self-tests have not completed since the computer last reset. It does not mean any part has failed.
How many drives does it take?
Often 50 to 100 miles spread over several days, including a cold start after the car sits overnight. Some cars finish sooner, and some need specific driving steps that the owner manual lists.
Why would my inspection fail?
Most states do not allow a car to be tested while its monitors show not ready. Finish a few days of mixed driving first, and ask the shop for a scan check before you go to inspection.
How much does it cost to fix P1000?
The most common fix, diagnostic scan (check engine light), has a typical range of $55 to $250 across the US. It is an estimate built from parts prices and local labor wages, not a quote. Your car and shop change it.
Typical range in 10 metro areas
Only the labor rate changes between cities. Same parts, same hours.
| Area | Typical range, estimate |
|---|---|
| Boston area, Massachusetts | $60 to $290 |
| New York City area | $60 to $280 |
| Los Angeles area, California | $60 to $280 |
| Chicago area, Illinois | $55 to $260 |
| Houston area, Texas | $50 to $250 |
| Dallas-Fort Worth area, Texas | $50 to $250 |
| Phoenix area, Arizona | $55 to $250 |
| Atlanta area, Georgia | $55 to $260 |
| Miami area, Florida | $50 to $250 |
| Seattle area, Washington | $60 to $280 |
Related codes
- P0455: Large fuel vapor leak
- P0420: Catalytic converter not working well (bank 1)
- P0442: Small fuel vapor leak
- P0128: Engine not warming up fast enough
More emissions codes
Code meaning written in our own words. Some codes mean different things on different makes, so check your scan tool or manual. Not a repair shop, estimates only.