BMW DTC P3124 – Cylinder 7 High Pressure Injector Low Side Circuit Open
DTC P3124 meaning on BMW
DTC P3124 on a BMW indicates an issue with the Cylinder 7 High Pressure Injector Low Side Circuit being open. This means that there is a problem with the electrical circuit that controls the high-pressure fuel injector for cylinder 7 in the engine.
BMW DTC P3124 symptoms
Symptoms of DTC P3124 on a BMW may include rough idling, misfiring, loss of power, poor fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P3124 causes
The causes of DTC P3124 on a BMW can vary, but common reasons include a faulty high-pressure fuel injector, wiring issues, a bad injector driver in the engine control module (ECM), or a poor connection in the injector circuit.
BMW DTC P3124 seriousness
DTC P3124 should be taken seriously as it can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P3124 on BMW
To diagnose DTC P3124 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then inspect the high-pressure injector for cylinder 7, check the wiring and connections for any damage or corrosion, and perform electrical tests to pinpoint the exact cause of the circuit open condition.
How to fix DTC P3124 on BMW
Fixing DTC P3124 on a BMW may involve replacing the faulty high-pressure fuel injector, repairing any damaged wiring or connections, or replacing the injector driver in the ECM if necessary. It is important to follow the manufacturer’s guidelines and use quality replacement parts to ensure a proper repair.
How to erase DTC P3124 on BMW
Once the underlying issue causing DTC P3124 on a BMW has been resolved, the fault codes can be cleared using a diagnostic scanner. This will erase the code from the ECM’s memory and turn off the check engine light. It is important to verify that the repair was successful by driving the vehicle and ensuring that the code does not return.
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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