P1674 – BMW DTC

BMW DTC P1674 – ASC (Automatic Stability Control) no Activity Detected

DTC P1674 meaning on BMW

DTC P1674 on a BMW refers to the Automatic Stability Control (ASC) system detecting no activity. The ASC system is responsible for enhancing vehicle stability by regulating wheel slip during acceleration or deceleration. When this diagnostic trouble code is triggered, it indicates that the ASC system is not functioning as intended.

BMW DTC P1674 symptoms

Symptoms associated with BMW DTC P1674 may include:

• Loss of traction control
• Increased wheel slippage
• Illumination of the ASC warning light on the dashboard

BMW DTC P1674 causes

The potential causes of DTC P1674 on a BMW include:

• Defective ASC control module
• Malfunctioning wheel speed sensors
• Wiring or connection issues in the ASC system

BMW DTC P1674 seriousness

The seriousness of DTC P1674 on a BMW lies in the compromised stability and traction control of the vehicle. Driving with a malfunctioning ASC system can increase the risk of loss of control, especially in adverse road conditions.

How to diagnose DTC P1674 on BMW

To diagnose DTC P1674 on a BMW, a mechanic can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ASC system.
2. Inspect the ASC control module for any visible damage or signs of malfunction.
3. Check the wheel speed sensors and their connections for proper operation.
4. Conduct a thorough inspection of the ASC system wiring for any breaks or shorts.

How to fix DTC P1674 on BMW

To fix DTC P1674 on a BMW, the following steps can be taken:

1. Replace the faulty ASC control module if diagnosed as the root cause.
2. Repair or replace malfunctioning wheel speed sensors.
3. Address any wiring or connection issues in the ASC system.
4. Clear the fault codes and perform a test drive to ensure proper ASC system functionality.

How to erase DTC P1674 on BMW

To erase DTC P1674 on a BMW, follow these steps:

1. Use a diagnostic scanner to access the ASC system and clear the fault codes.
2. Ensure that the underlying issue causing the fault code has been resolved.
3. Perform a test drive to confirm that the ASC system is functioning correctly.

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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