BMW DTC P1AC6 – Drive Motor ‘B’ Control Module Lost Crankshaft Position Sensor Signal
DTC P1AC6 meaning on BMW
DTC P1AC6 on a BMW indicates that the Drive Motor ‘B’ Control Module has lost the signal from the crankshaft position sensor. The crankshaft position sensor is a vital component that monitors the rotational speed and position of the crankshaft. When the control module loses this signal, it can lead to various issues with the engine’s performance.
BMW DTC P1AC6 symptoms
Symptoms of DTC P1AC6 on a BMW may include:
- Engine misfires
- Loss of power
- Engine stalling
- Difficulty starting the engine
- Check Engine Light (CEL) illuminated
BMW DTC P1AC6 causes
The common causes of DTC P1AC6 on a BMW are:
- Faulty crankshaft position sensor
- Wiring issues or poor connections related to the sensor
- Defective Drive Motor ‘B’ Control Module
- Interference from other electrical components
BMW DTC P1AC6 seriousness
DTC P1AC6 is a serious issue that should be addressed promptly. Ignoring this fault can lead to further damage to the engine and other components. It can also result in unsafe driving conditions due to potential engine stalling or loss of power.
How to diagnose DTC P1AC6 on BMW
To diagnose DTC P1AC6 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the crankshaft position sensor and its wiring for any visible damage
- Check the connections to the Drive Motor ‘B’ Control Module
- Perform a thorough inspection of the engine components for any related issues
How to fix DTC P1AC6 on BMW
To fix DTC P1AC6 on a BMW, the following steps may be taken:
- Replace the faulty crankshaft position sensor
- Repair any damaged wiring or connections related to the sensor
- If the Drive Motor ‘B’ Control Module is defective, it may need to be replaced
- Clear the fault codes and perform a test drive to ensure the issue is resolved
How to erase DTC P1AC6 on BMW
To erase DTC P1AC6 on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset, and the Check Engine Light should turn off. It is important to ensure that the underlying issue causing the fault code has been addressed before clearing the 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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