P2362
Glow Plug Module Control Module Power Circuit Low
The diesel glow plug control module reports a power-supply voltage below the operating threshold. Glow plug heating may be partially or fully disabled, causing hard cold start.
- 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.
- Weak battery / poor chargingCommon
- Voltage drop in module supplyPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Glow Plug Control Module
- Glow Plug Relay
- Battery
P2362 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.