garajizOBD-II code · manufacturer-specific
P1001
KOER Test Cannot Be Completed
- System
- P1 — Powertrain (manufacturer-specific)
- Severity
- Moderate (3/5)
- Can I keep driving?
- Drive with caution
What does P1001 mean?
P1001 is defined as “KOER Test Cannot Be Completed”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Ford, Lincoln, Mercury: KOER Test Cannot Be Completed
- Mazda: Unable to Achieve Self-Test Function Or SCP Error
Related codes
Look up another code
This page is general information; an exact diagnosis needs measurements and a technician’s check.