P064C
Glow Plug Control Module 1
A general fault is detected on the first glow plug control module - typically a self-diagnosis flag for an internal driver, supply, or watchdog issue.
- Check engine light: Yes
- Emissions related: Yes
- 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.
- Module internal faultCommon
Parts involved
- Glow Plug Control Module 1
P064C 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.