P0382Medium urgency
Glow Plug/Heater Circuit B Malfunction
Engine · Diesel Cold Start
⚠️ Fix before cold weather — hard starts possible.
What this means
A fault in glow plug circuit B on diesel engines with multiple glow plug circuits. Causes hard starting in cold weather and white smoke at startup.
Likely causes
- Failed glow plug(s) on circuit BMost common
- Failed glow plug relay BCommon
- Wiring fault in circuit BCommon
Estimated repair cost
Glow plug replacement (per plug)$20 – $60
Glow plug relay replacement$30 – $100
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Frequently asked questions
What does P0382 mean?
A fault in glow plug circuit B on diesel engines with multiple glow plug circuits. Causes hard starting in cold weather and white smoke at startup.
Is P0382 serious?
Fix before cold weather — hard starts possible.
How much does it cost to fix P0382?
Repair costs for P0382 range from $20 – $60 depending on the root cause and your vehicle.
Can I drive with P0382?
You can drive short distances but should have it repaired within 1-2 weeks to prevent further damage.