BMW DTC P13D3 – Knock Sensor 3 Circuit ‘B’ High (Bank 2)
DTC P13D3 meaning on BMW
The DTC P13D3 fault code on BMW vehicles indicates an issue with Knock Sensor 3 Circuit ‘B’ on Bank 2. The Knock Sensor is responsible for detecting abnormal combustion in the engine, which helps the engine control module adjust ignition timing to prevent engine knocking or pinging.
BMW DTC P13D3 symptoms
Symptoms of the DTC P13D3 code on a BMW may include engine knocking noises, reduced engine performance, rough idling, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P13D3 causes
The common causes of the DTC P13D3 fault code on BMW vehicles include a faulty Knock Sensor, wiring issues in the Knock Sensor circuit, poor electrical connections, or a problem with the engine control module.
BMW DTC P13D3 seriousness
Ignoring the DTC P13D3 fault code on a BMW can lead to potential engine damage, reduced fuel efficiency, and poor engine performance. It is important to address this issue promptly to prevent further complications.
How to diagnose DTC P13D3 on BMW
To diagnose the DTC P13D3 fault code on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the code and then perform a visual inspection of the Knock Sensor and its wiring. They may also conduct tests to check the sensor’s functionality and the integrity of the circuit.
How to fix DTC P13D3 on BMW
Fixing the DTC P13D3 fault code on a BMW usually involves replacing the faulty Knock Sensor, repairing any damaged wiring or connectors, or addressing any issues with the engine control module. Once the root cause is identified and resolved, the fault code should be cleared from the system.
How to erase DTC P13D3 on BMW
To erase the DTC P13D3 fault code on a BMW, a mechanic can use a diagnostic scanner to clear the code from the engine control module’s memory. After the repair has been completed and the issue resolved, the fault code can be erased to turn off the Check Engine Light and ensure the system is functioning properly.
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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