P263C
Glow Plug Control Driver Performance
The glow plug control driver does not respond to commands within tolerance. Cold-start glow function is degraded so cold starting can be delayed and white smoke increases.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
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.
- Aged driver shows degraded switching behaviourCommon
- Current feedback loop noisyPossible
Parts involved
- Glow Plug Controller
- Control Module
P263C 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.