BMW DTC P3146 – Cylinder 12 High Pressure Injector Low Side Circuit High
DTC P3146 meaning on BMW
The DTC P3146 on a BMW indicates an issue with the Cylinder 12 High Pressure Injector Low Side Circuit High. This means that there is a problem with the electrical circuit that controls the high-pressure fuel injector for cylinder 12 in the engine.
BMW DTC P3146 symptoms
Symptoms of the DTC P3146 on a BMW may include rough idling, misfiring, loss of power, decreased fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P3146 causes
The causes of the DTC P3146 on a BMW can vary, but common reasons include a faulty high-pressure fuel injector, wiring issues in the injector circuit, a malfunctioning engine control module (ECM), or a poor connection in the circuit.
BMW DTC P3146 seriousness
The seriousness of the DTC P3146 on a BMW depends on the underlying cause. Ignoring this issue can lead to poor engine performance, increased emissions, and potential damage to the engine over time. It is recommended to address this problem promptly.
How to diagnose DTC P3146 on BMW
To diagnose the DTC P3146 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the high-pressure injector and its wiring. They may also conduct tests to check the continuity of the circuit and the functionality of the injector.
How to fix DTC P3146 on BMW
Fixing the DTC P3146 on a BMW may involve replacing the faulty high-pressure fuel injector, repairing any damaged wiring or connectors in the circuit, or reprogramming the engine control module if necessary. It is recommended to follow the manufacturer’s repair procedures and use quality replacement parts.
How to erase DTC P3146 on BMW
Once the underlying issue causing the DTC P3146 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will erase the code from the vehicle’s memory and turn off the check engine light. It is important to ensure that the repair has been successful before clearing the 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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