P1640Emission-related codes stored in another module
- Ford code · Engine
- Turns on the check-engine light
- How the car detects it
- Another engine-related module asked the engine computer to turn on the check-engine light because it found an emission-related fault. P1640 itself is only a pointer: read the codes stored in the other modules.
- What you may notice
- Check-engine light
- Likely causes
- PossibleFault stored in a secondary engine-related module
- Sources
Backed by at least two independent sources.
From Obdaryn's Ford pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.