P0382 — Glow Plug/Heater Indicator Circuit Malfunction
Can drive — fix at your convenience.
What P0382 means
This code points to a fault in the glow plug indicator circuit, which controls the warning light that tells you when the glow plugs are heating. It's usually caused by a burned-out bulb, a wiring fault, or a problem in the control module that drives the indicator. It's a relatively minor code and is typically fixed by repairing the indicator circuit or replacing a bulb or controller.
Common symptoms
- Check engine light is on
- Glow plug indicator light doesn't illuminate or stays on
- No noticeable change in how the engine runs
- Indicator light behaves erratically
- Possible loss of the glow plug warning function
Common causes
- Burned-out glow plug indicator bulb
- Wiring or connector fault in the indicator circuit
- Faulty glow plug control module
- Bad instrument cluster driver for the light
- Blown fuse in the indicator circuit
Typical repair cost
$100 – $400
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0382 code?
Yes, this code rarely affects how the car drives. It mostly impacts the warning light, so you can continue driving, though it's worth verifying the actual glow plugs are still doing their job.
How much does it cost to fix a P0382 code?
Repairs usually fall between $100 and $400. A bulb or wiring fix is inexpensive, while a control module issue costs more to address.
Is a P0382 code serious?
No, it's one of the lower-priority codes. It affects the indicator light rather than engine operation, so it's more of an inconvenience than a danger.
Does P0382 mean my glow plugs are bad?
Not necessarily. This code is about the indicator circuit, not the glow plugs themselves, so your glow plugs may be fine. A technician can test them to confirm cold starting won't be affected.