BMW DTC P31CC – Cylinder 7 H2-Injector or High Pressure Injector High Side Circuit Low
DTC P31CC meaning on BMW
The DTC P31CC error code on a BMW indicates an issue with the Cylinder 7 H2-Injector or High-Pressure Injector High Side Circuit being detected as low. This fault typically points to a problem with the fuel injector or its associated circuitry in the high-pressure fuel system of the vehicle.
BMW DTC P31CC symptoms
Symptoms of the BMW DTC P31CC code may include rough idling, engine misfires, decreased fuel efficiency, loss of power, and potentially an illuminated check engine light on the dashboard.
BMW DTC P31CC causes
The common causes of the BMW DTC P31CC code include a faulty high-pressure fuel injector, wiring issues in the injector circuit, a clogged fuel injector, or problems with the fuel pressure sensor.
BMW DTC P31CC seriousness
Ignoring the DTC P31CC code on a BMW can lead to poor engine performance, reduced fuel efficiency, potential engine damage, and increased emissions. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P31CC on BMW
To diagnose the DTC P31CC on a BMW, a mechanic would typically perform a thorough inspection of the high-pressure fuel injector for Cylinder 7, check the wiring and connectors for any damage or corrosion, test the fuel pressure sensor, and use a diagnostic scanner to retrieve specific fault codes and data related to the issue.
How to fix DTC P31CC on BMW
Fixing the BMW DTC P31CC code may involve replacing the faulty high-pressure fuel injector, repairing any damaged wiring or connectors, cleaning or replacing a clogged injector, or addressing issues with the fuel pressure sensor. It is recommended to follow the manufacturer’s repair procedures and use quality replacement parts.
How to erase DTC P31CC on BMW
Once the underlying issue causing the DTC P31CC on a BMW has been resolved, the error code can be cleared using a diagnostic scanner capable of resetting fault codes. By erasing 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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