BMW DTC P3123 – Cylinder 6 High Pressure Injector Low Side Booster Time Error
DTC P3123 meaning on BMW
The Diagnostic Trouble Code (DTC) P3123 on a BMW indicates a Cylinder 6 High Pressure Injector Low Side Booster Time Error. This means that there is an issue with the high-pressure fuel injector in cylinder 6, specifically related to the booster time error on the low side.
BMW DTC P3123 symptoms
Symptoms of the BMW DTC P3123 may include rough idling, engine misfires, decreased fuel efficiency, loss of power, and potentially an illuminated check engine light on the dashboard.
BMW DTC P3123 causes
The causes of the BMW DTC P3123 can vary, but common reasons include a faulty high-pressure fuel injector, wiring issues, a malfunctioning fuel injector driver module, or problems with the engine control module (ECM).
BMW DTC P3123 seriousness
The seriousness of the BMW DTC P3123 lies in the potential for engine performance issues and decreased fuel efficiency. Ignoring this DTC can lead to further damage to the engine and other components over time.
How to diagnose DTC P3123 on BMW
To diagnose the DTC P3123 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes and then perform a thorough inspection of the high-pressure fuel injector in cylinder 6, along with checking the wiring and related components for any faults.
How to fix DTC P3123 on BMW
Fixing the BMW DTC P3123 usually involves replacing the faulty high-pressure fuel injector in cylinder 6, addressing any wiring issues, replacing the fuel injector driver module if necessary, and ensuring that the engine control module is functioning correctly.
How to erase DTC P3123 on BMW
Once the underlying issue causing the DTC P3123 on a BMW has been fixed, the fault codes can be cleared using a diagnostic scanner. This will erase the DTC from the system and reset 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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