BMW DTC P1327 – Knock/Combustion Vibration Sensor 2 Circuit Low (Bank 1)
DTC P1327 meaning on BMW
DTC P1327 on a BMW indicates a Knock/Combustion Vibration Sensor 2 Circuit Low fault in Bank 1. This fault code is triggered when the engine control module (ECM) detects a low voltage signal from the knock sensor located in Bank 1 of the engine.
BMW DTC P1327 symptoms
Symptoms of DTC P1327 on a BMW may include engine knocking or pinging noises, reduced engine performance, rough idling, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P1327 causes
The common causes of DTC P1327 on a BMW include a faulty knock sensor, wiring issues in the sensor circuit, poor electrical connections, or a malfunctioning engine control module (ECM).
BMW DTC P1327 seriousness
While DTC P1327 may not cause immediate harm to the engine, it can lead to reduced engine performance and fuel efficiency. Ignoring this fault code may result in long-term engine damage if the underlying issue is not addressed promptly.
How to diagnose DTC P1327 on BMW
To diagnose DTC P1327 on a BMW, a mechanic would typically start by inspecting the knock sensor and its wiring for any visible damage or corrosion. Using a multimeter, the sensor’s resistance and voltage output can be tested to determine if it is functioning correctly. Additionally, a scan tool can be used to monitor the sensor’s data while the engine is running to check for any irregularities.
How to fix DTC P1327 on BMW
Fixing DTC P1327 on a BMW usually involves replacing the faulty knock sensor, repairing any damaged wiring or connectors in the sensor circuit, and ensuring proper electrical connections. In some cases, reprogramming or replacing the engine control module (ECM) may be necessary if it is found to be the root cause of the fault.
How to erase DTC P1327 on BMW
Once the underlying issue causing DTC P1327 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. By accessing the ECM’s fault code memory and selecting the option to clear the code, the Check Engine Light should turn off, indicating that the fault code has been successfully erased.
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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