P0381 Code: Glow Plug Indicator Control Circuit Open
🟢 Low severity · drivable
Drivable — this code is about the dashboard glow plug light, not the glow plugs themselves.
What P0381 means
The circuit that controls the dashboard glow plug indicator light is open, so the light may not come on or may stay on. The glow plugs themselves can still be working fine — this code is about the warning light circuit.
Symptoms
- Check engine light is on
- Glow plug light doesn't come on
- Glow plug light stays on
- No driving symptoms
Common causes
- most common: Open wiring to the indicator light
- common: Burnt out indicator bulb
- less common: Faulty instrument cluster
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the indicator bulb | Yes | $5–30 |
| Repair the open indicator wiring | Mechanic | $50–150 |
| Repair or replace the instrument cluster | Mechanic | $150–400 |
Frequently asked questions
Can I drive with a P0381 code?
Yes. It only affects the dash glow plug light, not engine performance.
What is the most common cause of P0381?
An open circuit in the wiring to the glow plug indicator light.
How much does it cost to fix a P0381?
Often under $100; a new indicator bulb costs only a few dollars.
Related codes
P0380
P0380 Code: Glow Plug/Heater Circuit A Malfunction
P0382P0382 Code: Glow Plug/Heater Circuit B Malfunction
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.