P1000
OBD-II System Readiness Test Not Complete
What could P1000 mean for your vehicle?
Add your vehicle to explore possible causes and next checks. AI guidance helps you investigate; it does not confirm a diagnosis.
The P1000 code is a Ford-specific diagnostic trouble code that indicates the on-board diagnostic system has not yet completed all of its self-tests (readiness monitors). This is not a fault with your vehicle — it simply means the computer hasn't finished checking all the emissions-related systems. It commonly appears after a battery disconnect, battery replacement, or after clearing codes with a scan tool.
This code will resolve on its own through normal driving. Ford vehicles typically need a combination of city driving, highway driving, and cold starts over the course of several days to complete the full drive cycle. There is no repair needed, and your vehicle is perfectly safe to drive.
The main inconvenience of P1000 is that it can cause your vehicle to fail an emissions inspection since the monitors will report as 'not ready.' If you need to pass a smog test, drive the vehicle for 50–100 miles with a mix of speeds and conditions, including letting it sit overnight for a cold start. If the code persists after extensive driving, have a technician check for underlying issues that may be preventing a specific monitor from completing.
Severity
Symptoms
- •Check engine light is illuminated
- •Vehicle may fail emissions inspection or smog test
- •No noticeable drivability issues
- •OBD system reports 'not ready' status at inspection
Likely Causes
Disconnecting the battery resets all OBD monitors, requiring a full drive cycle before the system reports readiness.
Using a scan tool to clear codes also resets readiness monitors, and the vehicle must complete its self-test drive cycle.
Some monitors require specific driving conditions (highway, city, cold start) that haven't been met since the last reset.
Another fault in the emissions system may be preventing a specific monitor from running to completion.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Drive the vehicle through a complete OBD drive cycle (mix of highway and city driving over several days)
- Ensure no other trouble codes are present that may block monitor completion
- Perform a Ford-specific drive cycle procedure if preparing for emissions testing
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