BMW DTC P3112 – Cylinder 4 High Pressure Injector Low Side Circuit Open
DTC P3112 meaning on BMW
DTC P3112 on a BMW indicates an issue with the Cylinder 4 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 4 in the engine.
BMW DTC P3112 symptoms
Symptoms of DTC P3112 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 P3112 causes
The causes of DTC P3112 on a BMW can vary, but common reasons include a faulty high-pressure fuel injector, wiring issues, a damaged connector, or a problem with the Engine Control Module (ECM).
BMW DTC P3112 seriousness
DTC P3112 should be addressed promptly as it can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if left unresolved. Ignoring this issue may result in further complications and costly repairs.
How to diagnose DTC P3112 on BMW
To diagnose DTC P3112 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 4, check the wiring and connectors for any damage, and perform electrical tests to pinpoint the exact cause of the circuit open condition.
How to fix DTC P3112 on BMW
Fixing DTC P3112 on a BMW may involve replacing the faulty high-pressure fuel injector, repairing any damaged wiring or connectors, or addressing any issues with the ECM. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts to ensure proper functionality.
How to erase DTC P3112 on BMW
Once the underlying issue causing DTC P3112 on a BMW has been resolved, the fault codes can be cleared using a diagnostic scanner. By clearing the codes, the check engine light should turn off, indicating that the problem has been addressed successfully.
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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