BMW DTC P2347 – Cylinder 12 Above Knock/Combustion Vibration Sensor Threshold
DTC P2347 meaning on BMW
DTC P2347 on a BMW indicates that there is a fault with the Cylinder 12 Above Knock/Combustion Vibration Sensor. This sensor is responsible for detecting abnormal vibrations or knocking in the combustion process of cylinder 12. When the sensor detects that the vibrations or knocking exceed the predetermined threshold, it triggers the DTC P2347 code.
BMW DTC P2347 symptoms
Symptoms of DTC P2347 on a BMW may include engine misfires, rough idling, reduced engine performance, and potentially an illuminated check engine light on the dashboard. The vehicle may also experience decreased fuel efficiency due to the sensor detecting abnormal combustion in cylinder 12.
BMW DTC P2347 causes
The most common causes of DTC P2347 on a BMW include a faulty Cylinder 12 Above Knock/Combustion Vibration Sensor, wiring issues in the sensor circuit, or a problem with the sensor’s connection to the engine control module (ECM). Additionally, engine mechanical issues such as a misfire in cylinder 12 can also trigger this fault code.
BMW DTC P2347 seriousness
While DTC P2347 may not cause immediate drivability issues, it is important to address this fault code promptly to prevent potential damage to the engine over time. Ignoring the underlying issue that triggered the code can lead to further engine problems and increased repair costs.
How to diagnose DTC P2347 on BMW
To diagnose DTC P2347 on a BMW, a mechanic will typically use a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the Cylinder 12 Above Knock/Combustion Vibration Sensor. They will check the sensor’s wiring and connections for any signs of damage or corrosion. Additionally, a comprehensive engine inspection may be necessary to identify any underlying mechanical issues that could be causing abnormal vibrations in cylinder 12.
How to fix DTC P2347 on BMW
Fixing DTC P2347 on a BMW usually involves replacing the faulty Cylinder 12 Above Knock/Combustion Vibration Sensor. The sensor should be inspected and tested to confirm the fault before proceeding with the replacement. If the issue is related to wiring or connections, repairing or replacing the damaged components may resolve the problem. Once the repair is completed, the fault code should be cleared from the ECM memory.
How to erase DTC P2347 on BMW
To erase DTC P2347 on a BMW, a diagnostic scanner can be used to clear the fault code from the engine control module’s memory. After the underlying issue has been addressed and the repair is completed, the mechanic can reset the fault code to turn off the check engine light and ensure that the vehicle’s ECM no longer registers the fault.
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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