BMW DTC P1389 – Ion Ignition Coil Cylinder 5
DTC P1389 meaning on BMW
DTC P1389 for BMW indicates an issue with the Ion Ignition Coil Cylinder 5. This diagnostic trouble code is specific to BMW vehicles and points to a problem with the ignition coil in cylinder 5.
BMW DTC P1389 symptoms
Symptoms of BMW DTC P1389 may include engine misfires, rough idling, loss of power, and potentially an illuminated check engine light on the dashboard.
BMW DTC P1389 causes
The most common causes of BMW DTC P1389 include a faulty ignition coil in cylinder 5, wiring issues, or a problem with the engine control module (ECM).
BMW DTC P1389 seriousness
Ignoring DTC P1389 on a BMW can lead to poor engine performance, reduced fuel efficiency, and potential damage to the catalytic converter over time. It is recommended to address this issue promptly.
How to diagnose DTC P1389 on BMW
To diagnose DTC P1389 on a BMW, start by using a diagnostic scanner to retrieve the fault codes. Then, perform a visual inspection of the ignition coil in cylinder 5 and its wiring for any visible damage. You can also use a multimeter to test the resistance of the ignition coil.
How to fix DTC P1389 on BMW
To fix DTC P1389 on a BMW, you may need to replace the ignition coil in cylinder 5 if it is found to be faulty. Ensure that the wiring connections are secure and free of corrosion. Clear the fault codes after making any necessary repairs.
How to erase DTC P1389 on BMW
To erase DTC P1389 on a BMW, use a diagnostic scanner to clear the fault codes stored in the ECM. After clearing the codes, test drive the vehicle to ensure that the issue has been resolved and that the check engine light does not reappear.
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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