P1000 — OBD-II Monitor Testing Not Complete — 6.7 Powerstroke
P1000 on a 6.7 Powerstroke means the PCM’s readiness monitors have not finished since the last code clear or battery disconnect. It is informational and does…
What it means
The PCM has not yet completed its OBD-II readiness monitors after a recent code clear or power loss. The code is informational and typically clears once a proper drive cycle is performed.1
Most likely causes
- Recent code clear or battery disconnect — Readiness monitors reset when codes are cleared or battery power is lost; P1000 is expected until monitors run to completion.1
- Incomplete drive cycle — Monitors require specific engine, speed, temperature and load conditions to run. If the vehicle has not been driven through the required profile, monitors remain incomplete.1
- Intermittent power loss to PCM — Repeated loss of keep-alive power can prevent monitors from finishing. Investigate battery, connections and charging system health.1
How to diagnose
- Verify no other DTCs are present; P1000 alone is informational.
- Confirm recent scan-tool code clear or battery service.
- Check battery voltage and connections; stable power is required for monitor completion.
- Perform manufacturer drive cycle: cold start, idle, steady cruise, deceleration, and varied load while monitoring readiness status with a scan tool.
- If monitors will not set, check for pending codes or conditions that inhibit monitors, such as low fuel, extreme temperatures, or other active faults.
Specs and test values
| Check | Normal reading | When to measure | Source |
|---|---|---|---|
| Battery and charging voltage | 12.6–12.7 V at rest when fully charged; about 13.5 V running | Engine off, then running with loads on | DieselHub |
Parts and tools you may need
- OBD-II scan tool with readiness monitor display
- Digital multimeter
- Battery maintainer (optional)
Tools you’ll need
- OBD-II scan tool — It reads readiness monitor status and confirms P1000 is informational while checking for other DTCs that could inhibit monitor completion.
- Digital multimeter — It verifies stable battery voltage and clean PCM power/ground connections required for monitors to run.
- Battery maintainer — It keeps system voltage steady during extended drive cycles so power loss does not reset monitor progress.
Rough cost and difficulty
| Likely repair | Parts | Shop labor | Who usually does it |
|---|---|---|---|
| Shop diagnosis | — | 1–2 hrs | Shop |
| Battery or charging-system repair | $150–$500 | 0.5–2 hrs | Easy DIY |
Typical US independent-shop figures; labor runs about $120–$180 per hour (dealers charge more). Confirm the diagnosis before buying parts.
When to see a pro
If readiness monitors do not complete after multiple proper drive cycles, have the PCM and supporting systems evaluated by a qualified diesel technician to rule out a fault that inhibits monitor execution.
Check for recalls
Recalls are tied to your truck’s VIN, so check yours directly: enter the VIN at NHTSA’s recall lookup. Open safety recalls are repaired free at a dealer.
Sources
Repair videos: P1000 on the 6.7 Power Stroke
Third-party videos, not ours — picked for this engine. Confirm anything against the factory service information for your truck.
Spotted an error, or something missing? Tell us
Run a 6.7 Powerstroke? This goes straight to the editor — it is not published.