P269C
Exhaust Aftertreatment Glow Plug Control Performance
The aftertreatment glow plug control responds to commands but the resulting current draw is out of tolerance. Worn glow plug or high-resistance contact.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Glow plug warning light on (often orange coil symbol)
- Hard cold start or no start in cold weather
- White smoke from exhaust during warm-up
Common causes
Ordered by how often each turns out to be the cause.
- Worn glow plug element raises resistanceCommon
- Corroded connector at glow plugPossible
Parts involved
- Aftertreatment Glow Plug
- Relay
P269C is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.