BMW DTC P3104 – Cylinder 2 High Pressure Injector Low Side Circuit Open
DTC P3104 meaning on BMW
DTC P3104 on a BMW indicates an issue with the Cylinder 2 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 2 in the engine.
BMW DTC P3104 symptoms
Symptoms of DTC P3104 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 P3104 causes
The causes of DTC P3104 on a BMW can vary, but common reasons include a faulty high-pressure injector, wiring issues, connector problems, or a malfunctioning Engine Control Module (ECM).
BMW DTC P3104 seriousness
DTC P3104 should be taken seriously as it can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if left unresolved for an extended period.
How to diagnose DTC P3104 on BMW
To diagnose DTC P3104 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM. They would then inspect the high-pressure injector for cylinder 2, check the wiring and connectors for any visible damage, and perform electrical tests to pinpoint the issue.
How to fix DTC P3104 on BMW
Fixing DTC P3104 on a BMW may involve replacing the faulty high-pressure injector, repairing any damaged wiring or connectors, or reprogramming the ECM if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine parts to ensure a proper fix.
How to erase DTC P3104 on BMW
Once the underlying issue causing DTC P3104 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 issue has been fixed before clearing the codes.
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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