BMW DTC P0682 – Cylinder 12 Glow Plug Circuit/Open
DTC P0682 meaning on BMW
The Diagnostic Trouble Code (DTC) P0682 for BMW indicates a fault in the cylinder 12 glow plug circuit, specifically an open circuit. This means that the Engine Control Module (ECM) has detected a lack of continuity in the circuit responsible for controlling the glow plug in cylinder 12.
BMW DTC P0682 symptoms
Symptoms of a DTC P0682 in a BMW may include:
- Difficulty starting the engine, especially in cold weather
- Engine misfires or rough idling
- Reduced engine performance
- Illumination of the Check Engine Light
BMW DTC P0682 causes
The common causes of a DTC P0682 in a BMW include:
- Faulty glow plug in cylinder 12
- Wiring issues such as open circuits or shorts
- Defective glow plug control module
- Faulty Engine Control Module (ECM)
BMW DTC P0682 seriousness
While a DTC P0682 may not cause immediate drivability issues, it is important to address this fault promptly to ensure proper engine performance, especially in cold conditions. Ignoring this fault can lead to further complications and potential damage to the engine.
How to diagnose DTC P0682 on BMW
To diagnose a DTC P0682 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and verify the presence of DTC P0682.
- Inspect the glow plug in cylinder 12 for any signs of damage or wear.
- Check the wiring harness connected to the glow plug for continuity and any visible damage.
- Test the glow plug control module and ECM for proper functionality.
How to fix DTC P0682 on BMW
To fix a DTC P0682 on a BMW, you can perform the following steps:
- Replace the faulty glow plug in cylinder 12 with a new one.
- Repair any damaged wiring in the glow plug circuit.
- Replace the glow plug control module if it is found to be defective.
- If necessary, reprogram or replace the Engine Control Module (ECM).
How to erase DTC P0682 on BMW
To erase the DTC P0682 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After performing the necessary repairs and ensuring that the issue has been resolved, you can reset the fault code to turn off the Check Engine Light.
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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