P0381
Glow Plug/Heater Indicator Circuit Malfunction
Generic code
Ignition System
High severity
Moderate repair
Free on OBD DashX
Want real-world data on P0381?
See which problems come with P0381, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0381 means
- The fault code P0381 indicates that there is a problem with the Glow Plug or Heater Circuit 'A'. This fault code is generally related to diesel engines. The glow plugs warm up the air in the combustion chamber, which is necessary for starting a diesel engine. If the circuit is malfunctioning, it could prevent the engine from starting or cause poor performance.
Possible symptoms
- Difficulty starting the engine, especially in cold weather
- Illuminated check engine light
- Rough idle or stalling
- Reduced engine power or acceleration
Possible causes
- Failed glow plugs
- Wiring or connection issues in the circuit
- Failed glow plug control module
- Corroded electrical connections
Related parts
- Glow Plug: A glowplug is a heating device that helps to start diesel engines. This car's glow plug has a problem which may cause hesitation while starting the car or the car not starting at all
Possible solutions
- Replace failed glow plugs
- Check and repair any damaged wiring or connections
- Clean or replace corroded electrical connections
- Replace the glow plug control module if necessary
Free on OBD DashX
P0381 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0381 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.