BMW DTC P1399 – Internal Ionic Current Control Module Error (Bank 2)
DTC P1399 meaning on BMW
DTC P1399 on a BMW indicates an Internal Ionic Current Control Module Error in Bank 2. This fault code is related to the control module that manages the ionic current in the engine, specifically in Bank 2 of the vehicle.
BMW DTC P1399 symptoms
Symptoms of DTC P1399 on a BMW may include rough idling, engine misfires, loss of power, and potentially an illuminated check engine light on the dashboard. The vehicle may also experience decreased fuel efficiency and overall performance issues.
BMW DTC P1399 causes
The Internal Ionic Current Control Module Error (Bank 2) with DTC P1399 on a BMW can be caused by a faulty ionic current control module, wiring issues, or a malfunction in the engine control unit (ECU). It may also be triggered by a software glitch or a communication error between the various engine control components.
BMW DTC P1399 seriousness
While DTC P1399 may not always result in immediate drivability issues, it is important to address this fault code promptly to prevent potential damage to the engine or other components. Ignoring this error could lead to more severe problems over time and may result in costly repairs.
How to diagnose DTC P1399 on BMW
To diagnose DTC P1399 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the ionic current control module, wiring, and related components. They may also conduct tests to check for any software issues or communication errors within the engine control system.
How to fix DTC P1399 on BMW
Fixing DTC P1399 on a BMW may involve replacing the faulty ionic current control module, repairing any damaged wiring, or updating the engine control unit software. It is recommended to consult with a qualified mechanic or BMW dealership to accurately diagnose and address the root cause of the issue.
How to erase DTC P1399 on BMW
Once the underlying issue causing DTC P1399 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and erase the error code from the vehicle’s memory. It is important to ensure that the problem has been properly fixed before clearing the fault code.
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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