OBD2 Car ScannerWhat does P0383 mean?
P0383 stands for Glow Plug Control Module Control Circuit Low. The engine computer has detected an ignition problem or a misfire, meaning one or more cylinders are not burning fuel properly.
Powertrain codes cover the engine, transmission and emissions. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Worn spark plugs
- Faulty ignition coil or plug wires
- Clogged fuel injector
- Vacuum leak
- Low compression
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does P0383 mean?
P0383 means “Glow Plug Control Module Control Circuit Low”. It belongs to the ignition system or misfire group: The engine computer has detected an ignition problem or a misfire, meaning one or more cylinders are not burning fuel properly.
Is it safe to drive with P0383?
Avoid driving long distances. This kind of fault can cause damage or affect safety, so get it checked as soon as possible.
How do I clear P0383?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- P037FGlow Plug Sense Circuit High
- P0380Glow Plug/Heater Circuit A
- P0381Glow Plug/Heater Indicator Circuit Malfunction
- P0382Glow Plug/Heater Circuit B
- P0384Glow Plug Control Module Control Circuit High
- P0385Crankshaft Position Sensor B Circuit Malfunction
- P0386Crankshaft Position Sensor B Circuit Range/Performance
- P0387Crankshaft Position Sensor B Circuit Low Input
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.