BMW DTC P136C – Knock Control Super Knocking Detected
DTC P136C meaning on BMW
DTC P136C on a BMW indicates that the Knock Control system has detected super knocking. Super knocking, also known as detonation, is an abnormal combustion event that can cause engine damage if not addressed promptly. The engine control module (ECM) monitors engine knock to adjust ignition timing and prevent knocking, but when super knocking is detected, it means that the knock sensor has picked up severe knocking that could potentially harm the engine.
BMW DTC P136C symptoms
Symptoms of DTC P136C on a BMW may include engine knocking or pinging noises, reduced engine performance, rough idling, decreased fuel efficiency, and in severe cases, potential engine damage. The Check Engine Light (CEL) may also illuminate on the dashboard to indicate a fault with the knock control system.
BMW DTC P136C causes
The causes of DTC P136C on a BMW can vary and may include issues such as low-quality fuel, incorrect ignition timing, carbon buildup in the combustion chamber, a faulty knock sensor, or a malfunctioning ECM. Super knocking can also be triggered by high engine temperatures, pre-ignition, or a lean air-fuel mixture.
BMW DTC P136C seriousness
DTC P136C should be taken seriously as super knocking can lead to engine damage if left unresolved. Ignoring the issue can result in piston damage, cylinder head damage, or even catastrophic engine failure. It is crucial to address DTC P136C promptly to prevent costly repairs and ensure the longevity of the engine.
How to diagnose DTC P136C on BMW
To diagnose DTC P136C on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then inspect the knock sensor, check the ignition timing, examine the fuel quality, and perform a visual inspection of the engine components for any signs of damage or wear. Additionally, a test drive may be conducted to listen for engine knocking and assess overall performance.
How to fix DTC P136C on BMW
Fixing DTC P136C on a BMW may involve several steps, including replacing the knock sensor if faulty, ensuring the correct ignition timing, using high-quality fuel, cleaning carbon deposits from the combustion chamber, and addressing any underlying issues that may be causing super knocking. It is essential to follow manufacturer guidelines and consult with a qualified mechanic to properly diagnose and repair the issue.
How to erase DTC P136C on BMW
To erase DTC P136C on a BMW, the fault codes can be cleared using a diagnostic scanner or code reader. Once the underlying issue causing the fault code has been addressed and fixed, the ECM can be reset to clear the code. It is important to ensure that the repair has been successful and that the issue causing super knocking has been resolved before clearing the fault code.
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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