BMW DTC P13D6 – Knock Sensor 4 Circuit ‘B’ Low (Bank 2)
DTC P13D6 meaning on BMW
The DTC P13D6 for BMW indicates a fault with Knock Sensor 4 Circuit ‘B’ on Bank 2. This means that the engine control module (ECM) has detected a low voltage signal from the knock sensor located on Bank 2 of the engine.
BMW DTC P13D6 symptoms
Symptoms of the DTC P13D6 on a BMW may include engine knocking or pinging noises, reduced engine performance, hesitation during acceleration, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P13D6 causes
The most common causes of the DTC P13D6 on a BMW include a faulty knock sensor, wiring issues in the knock sensor circuit, poor electrical connections, or a problem with the engine control module (ECM).
BMW DTC P13D6 seriousness
While the DTC P13D6 may not cause immediate engine failure, it is important to address this issue promptly to prevent potential damage to the engine over time. Ignoring this fault could lead to decreased engine performance and efficiency.
How to diagnose DTC P13D6 on BMW
To diagnose the DTC P13D6 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the knock sensor and its wiring. They may also test the sensor’s resistance and check for any loose connections.
How to fix DTC P13D6 on BMW
To fix the DTC P13D6 on a BMW, the faulty knock sensor or any damaged wiring should be replaced. It is important to ensure that the new sensor is properly installed and that all connections are secure. After the repair, the fault code should be cleared from the ECM.
How to erase DTC P13D6 on BMW
The DTC P13D6 code can be erased from a BMW by using a diagnostic scanner to clear the code from the engine control module (ECM). Once the repair has been completed and the issue resolved, the code can be cleared to 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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