BMW DTC P3122 – Cylinder 6 High Pressure Injector Low Side Circuit High
DTC P3122 meaning on BMW
The DTC P3122 code on a BMW indicates an issue with the Cylinder 6 High Pressure Injector Low Side Circuit High. This means that there is a problem with the electrical circuit that controls the fuel injector for cylinder 6, resulting in high voltage or resistance in the circuit.
BMW DTC P3122 symptoms
Symptoms of DTC P3122 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 P3122 causes
The causes of DTC P3122 on a BMW can vary, but common reasons include a faulty fuel injector, wiring issues, poor electrical connections, or a problem with the Engine Control Module (ECM).
BMW DTC P3122 seriousness
Ignoring DTC P3122 on a BMW can lead to poor engine performance, reduced fuel efficiency, and potential damage to the engine over time. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P3122 on BMW
To diagnose DTC P3122 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 perform a visual inspection of the fuel injector and its wiring, check for any loose connections, and conduct electrical tests to pinpoint the exact cause of the issue.
How to fix DTC P3122 on BMW
Fixing DTC P3122 on a BMW may involve replacing the faulty fuel injector, repairing any damaged wiring or connectors, or resetting the ECM if necessary. It is recommended to follow the manufacturer’s repair procedures and use quality replacement parts to ensure a proper fix.
How to erase DTC P3122 on BMW
Once the underlying issue causing DTC P3122 on a BMW has been resolved, the fault codes can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s ECM to monitor the system for any new faults.
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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