P2174 – BMW DTC

BMW DTC P2174 – Throttle Actuator Control System – Sudden Low Air Flow Detected

DTC P2174 meaning on BMW

DTC P2174 on a BMW indicates that the Throttle Actuator Control System has detected a sudden low airflow. This means that the amount of air entering the engine is not sufficient for proper operation, which can lead to performance issues.

BMW DTC P2174 symptoms

Symptoms of DTC P2174 on a BMW may include:

• Reduced engine power
• Engine stalling or hesitation
• Check Engine Light illuminated
• Rough idling

BMW DTC P2174 causes

Common causes of DTC P2174 on a BMW include:

• Dirty or clogged air filter
• Faulty throttle actuator
• Vacuum leaks
• Issues with the Mass Air Flow (MAF) sensor

BMW DTC P2174 seriousness

DTC P2174 should be taken seriously as it can lead to poor engine performance and potential drivability issues. Ignoring this code may result in further damage to engine components.

How to diagnose DTC P2174 on BMW

To diagnose DTC P2174 on a BMW, you can perform the following steps:

1. Check the air filter for dirt or clogs
2. Inspect the throttle actuator for proper operation
3. Scan the vehicle for any other related fault codes
4. Check for vacuum leaks in the intake system
5. Test the Mass Air Flow (MAF) sensor for proper function

How to fix DTC P2174 on BMW

To fix DTC P2174 on a BMW, you can try the following solutions:

1. Replace the air filter if dirty or clogged
2. Repair or replace the throttle actuator if faulty
3. Fix any vacuum leaks in the intake system
4. Clean or replace the Mass Air Flow (MAF) sensor
5. Clear the fault code and reset the Check Engine Light

How to erase DTC P2174 on BMW

To erase DTC P2174 on a BMW, you can use an OBD-II scanner to clear the fault code from the vehicle’s computer. Once the code is cleared, the Check Engine Light should turn off. However, it is important to address the underlying issue that caused the code to prevent it from reoccurring.

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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