BMW DTC P315C – Cylinder 11 High Pressure Injector Low Side/High Side Circuit Open
DTC P315C meaning on BMW
The DTC P315C code on a BMW indicates an issue with the high-pressure injector in cylinder 11. Specifically, it points to a fault in the low side or high side circuit being open, meaning there is a break in the electrical connection that controls the injector’s operation.
BMW DTC P315C symptoms
Symptoms of the DTC P315C code on 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 P315C causes
The causes of the DTC P315C code on a BMW can vary, but common reasons include a faulty high-pressure injector, wiring issues, poor electrical connections, or a problem with the engine control module (ECM).
BMW DTC P315C seriousness
Ignoring the DTC P315C code on a BMW can lead to engine performance issues, 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 P315C on BMW
To diagnose the DTC P315C code 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 in cylinder 11, check the wiring and connections for any visible damage, and perform electrical tests to pinpoint the exact cause of the circuit open fault.
How to fix DTC P315C on BMW
Fixing the DTC P315C code on a BMW may involve replacing the high-pressure injector in cylinder 11 if it is found to be faulty. Additionally, any damaged wiring or connectors should be repaired or replaced. Once the issue is addressed, the fault codes can be cleared from the ECM to reset the system.
How to erase DTC P315C on BMW
To erase the DTC P315C code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the ECM. After the repairs have been made and the issue resolved, the code can be erased to reset the system and turn off the check engine light.
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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