P0381 – BMW DTC

BMW DTC P0381 – GLow Plug/Heater Indicator Control Circuit/Open

DTC P0381 meaning on BMW

DTC P0381 on a BMW indicates a fault with the Glow Plug/Heater Indicator Control Circuit. This fault code is triggered when the Engine Control Module (ECM) detects an open circuit in the control circuit for the glow plug/heater indicator.

BMW DTC P0381 symptoms

Symptoms of DTC P0381 on a BMW may include:

• Check Engine Light illuminated
• Difficulty starting the engine, especially in cold weather
• Reduced engine performance

BMW DTC P0381 causes

Common causes of DTC P0381 on a BMW include:

• Faulty glow plug/heater indicator
• Open or short circuit in the control wiring
• Defective Engine Control Module (ECM)

BMW DTC P0381 seriousness

DTC P0381 should not be ignored as it can lead to starting issues and reduced engine performance, especially in cold conditions. It is recommended to address this fault promptly to avoid further complications.

How to diagnose DTC P0381 on BMW

To diagnose DTC P0381 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the glow plug/heater indicator control circuit for any visible damage or loose connections
3. Test the glow plug/heater indicator for proper functionality
4. Check the wiring harness for continuity and shorts
5. Inspect the ECM for any signs of damage or malfunction

How to fix DTC P0381 on BMW

To fix DTC P0381 on a BMW, you can try the following:

1. Replace the faulty glow plug/heater indicator
2. Repair any open or short circuits in the control wiring
3. If the ECM is faulty, replace it with a new one
4. Clear the fault code and test the vehicle to ensure the issue is resolved

How to erase DTC P0381 on BMW

To erase DTC P0381 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. Once the code is cleared, you can perform a test drive to ensure the issue has been resolved.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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