BMW DTC P315D – Cylinder 12 High Pressure Injector Low Side Interturn Short Circuit or Circuit High
DTC P315D meaning on BMW
DTC P315D is a fault code that indicates a Cylinder 12 High Pressure Injector Low Side Interturn Short Circuit or Circuit High issue on a BMW vehicle. This fault code specifically points to a problem with the high-pressure fuel injector in cylinder 12 of the engine.
BMW DTC P315D symptoms
Symptoms of BMW DTC P315D may include rough idling, misfiring, loss of power, decreased fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P315D causes
The causes of BMW DTC P315D can vary, but common reasons include a faulty high-pressure fuel injector, wiring issues, or a problem with the engine control module (ECM).
BMW DTC P315D seriousness
Ignoring BMW DTC P315D can lead to poor engine performance, potential damage to the catalytic converter, and increased emissions. It is important to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P315D on BMW
To diagnose BMW DTC P315D, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the high-pressure fuel injector in cylinder 12. They may also test the wiring and connections related to the injector to identify any issues.
How to fix DTC P315D on BMW
Fixing BMW DTC P315D usually involves replacing the faulty high-pressure fuel injector in cylinder 12. Additionally, any damaged wiring or connections should be repaired or replaced as needed. Once the repairs are completed, the fault code should be cleared from the ECM.
How to erase DTC P315D on BMW
To erase DTC P315D on a BMW, a diagnostic scanner can be used to clear the fault code from the engine control module. After the repairs have been made and the issue resolved, the fault code should be cleared to reset the check engine light and ensure that the problem has been successfully addressed.
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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