BMW DTC P317D – Cylinder 3 H2-Injector Low Side Circuit/Open
DTC P317D meaning on BMW
DTC P317D indicates a fault with the Cylinder 3 H2-Injector Low Side Circuit/Open in a BMW vehicle. This fault code specifically points to an issue with the fuel injector for cylinder 3, where the low side circuit is either malfunctioning or open.
BMW DTC P317D symptoms
Symptoms of DTC P317D in a BMW may include rough idling, misfires, loss of power, decreased fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P317D causes
The possible causes of DTC P317D on a BMW include a faulty fuel injector for cylinder 3, wiring issues in the low side circuit, poor electrical connections, or a problem with the Engine Control Module (ECM).
BMW DTC P317D seriousness
Ignoring DTC P317D in a BMW can lead to engine performance issues, reduced fuel efficiency, and potential damage to the catalytic converter over time. It is recommended to address this fault code promptly to prevent further complications.
How to diagnose DTC P317D on BMW
To diagnose DTC P317D on a BMW, a mechanic would typically perform a visual inspection of the fuel injector and its wiring, conduct electrical tests to check for continuity and resistance, use a scan tool to retrieve live data and freeze frame data, and potentially perform a cylinder balance test to pinpoint the specific cylinder with the issue.
How to fix DTC P317D on BMW
Fixing DTC P317D on a BMW may involve replacing the faulty fuel injector for cylinder 3, repairing any damaged wiring or connectors in the low side circuit, ensuring proper electrical connections, and clearing the fault code from the ECM memory.
How to erase DTC P317D on BMW
To erase DTC P317D on a BMW, a mechanic can use a diagnostic scan tool to clear the fault code from the ECM memory. After addressing the underlying issue causing the fault code, clearing it from the system will reset the check engine light and ensure proper operation.
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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