P0381
Glow Plug/Heater Indicator Control Circuit/Open
P0381 is an OBD-II diagnostic trouble code meaning: Glow Plug/Heater Indicator Control Circuit/Open. Common causes: open or short circuit in wiring harness, faulty glow plug relay. Estimated repair cost: $33–167.
Symptoms
- The glow plug indicator does not light up when the ignition is turned on
- Difficulty starting the engine in cold weather
- Floating idle speed after starting
Causes
- Open or short circuit in wiring harness
- Faulty glow plug relay
- Problems with the indicator on the dashboard
- Engine control unit malfunction
- Oxidation of contacts in the circuit
How to Fix
- Checking the integrity of the indicator circuit wiring harness
- Testing the operation of the glow plug relay
- Checking the indicator on the dashboard
- Engine control unit diagnostics
- Cleaning and restoring contacts in the circuit
Related codes
Error P0381 by Vehicle Brand
FAQ
What does the P0381 code mean?
P0381 is an OBD-II diagnostic trouble code that indicates: Glow Plug/Heater Indicator Control Circuit/Open
What causes a P0381 error code?
The most common causes of P0381 include: Open or short circuit in wiring harness; Faulty glow plug relay; Problems with the indicator on the dashboard; Engine control unit malfunction.
How do I fix a P0381 diagnostic trouble code?
To fix P0381: Checking the integrity of the indicator circuit wiring harness. Testing the operation of the glow plug relay. Checking the indicator on the dashboard. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0381?
Limited driving only, diagnose soon
How much does it cost to fix P0381?
The estimated repair cost for P0381 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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