BMW DTC P13C8 – Knock Sensor 2 Circuit ‘B’ High (Bank 1)
DTC P13C8 meaning on BMW
The DTC P13C8 code on a BMW indicates a problem with Knock Sensor 2 Circuit ‘B’ on Bank 1. This means that the engine control module (ECM) has detected a high voltage signal from the knock sensor located on Bank 1 of the engine.
BMW DTC P13C8 symptoms
Symptoms of the DTC P13C8 code on a BMW may include engine knocking or pinging noises, reduced engine performance, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P13C8 causes
The most common causes of the DTC P13C8 code on a BMW are a faulty knock sensor, wiring issues in the knock sensor circuit, or a problem with the engine control module (ECM).
BMW DTC P13C8 seriousness
While the DTC P13C8 code may not cause immediate drivability issues, it is important to address the underlying problem to prevent potential engine damage and ensure optimal performance and fuel efficiency.
How to diagnose DTC P13C8 on BMW
To diagnose the DTC P13C8 code on a BMW, a mechanic will typically use a scan tool to retrieve the fault codes and perform a visual inspection of the knock sensor and its wiring. They may also test the knock sensor’s resistance and check for any loose connections or damaged wiring.
How to fix DTC P13C8 on BMW
To fix the DTC P13C8 code on a BMW, the faulty knock sensor or damaged wiring should be replaced. It is important to follow the manufacturer’s recommended procedures for sensor replacement and ensure proper installation to prevent future issues.
How to erase DTC P13C8 on BMW
Once the underlying issue causing the DTC P13C8 code has been resolved, the code can be cleared using a scan tool. This will reset the Check Engine Light and allow the ECM to monitor the system for any new faults.
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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