BMW DTC P3174 – Cylinder 9 High Pressure Injector High Side Circuit High
DTC P3174 meaning on BMW
DTC P3174 on a BMW indicates an issue with the high-pressure injector high side circuit in cylinder 9. This fault code specifically points to a high voltage condition in the circuit related to the high-pressure fuel injector for cylinder 9.
BMW DTC P3174 symptoms
Symptoms of DTC P3174 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 P3174 causes
The high-pressure injector high side circuit high fault (DTC P3174) on a BMW can be caused by issues such as a faulty high-pressure fuel injector, wiring harness problems, poor electrical connections, or issues with the engine control module (ECM).
BMW DTC P3174 seriousness
Ignoring DTC P3174 on a BMW can lead to poor engine performance, potential damage to the catalytic converter, and increased emissions. It is important to address this fault code promptly to prevent further issues.
How to diagnose DTC P3174 on BMW
To diagnose DTC P3174 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform further testing to pinpoint the exact cause. This may involve checking the high-pressure injector for cylinder 9, inspecting the wiring harness, and testing the electrical connections.
How to fix DTC P3174 on BMW
Fixing DTC P3174 on a BMW may involve replacing the high-pressure fuel injector for cylinder 9 if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the high side circuit and ensuring proper connections can help resolve this issue.
How to erase DTC P3174 on BMW
Once the underlying issue causing DTC P3174 on a BMW has been fixed, the fault code can be cleared using a diagnostic scanner. By clearing the code, the check engine light should turn off, indicating that the problem has been 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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