BMW DTC P2173 – Throttle Actuator Control System – High Air Flow Detected
DTC P2173 meaning on BMW
DTC P2173 on a BMW indicates an issue with the Throttle Actuator Control System, specifically that high air flow has been detected. This means that the amount of air entering the engine is not within the expected parameters, which can lead to performance issues.
BMW DTC P2173 symptoms
Symptoms of DTC P2173 on a BMW may include rough idling, reduced engine power, hesitation or stalling during acceleration, and the Check Engine Light being illuminated on the dashboard.
BMW DTC P2173 causes
The high air flow detected in the Throttle Actuator Control System on a BMW can be caused by a variety of factors, such as a faulty throttle body, a vacuum leak, a dirty or malfunctioning mass airflow sensor, or issues with the intake system.
BMW DTC P2173 seriousness
While DTC P2173 may not always result in immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the engine and ensure optimal performance of the vehicle.
How to diagnose DTC P2173 on BMW
To diagnose DTC P2173 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer system. They would then perform a visual inspection of the throttle body, intake system, and related components to check for any visible signs of damage or wear.
- Use a diagnostic scanner to retrieve fault codes
- Inspect throttle body for any issues
- Check for vacuum leaks
- Inspect mass airflow sensor
- Examine intake system for blockages or leaks
How to fix DTC P2173 on BMW
Fixing DTC P2173 on a BMW may involve cleaning or replacing the throttle body, repairing any vacuum leaks, cleaning or replacing the mass airflow sensor, and ensuring the intake system is free from obstructions or leaks.
- Clean or replace throttle body
- Repair vacuum leaks
- Clean or replace mass airflow sensor
- Check and repair intake system
How to erase DTC P2173 on BMW
Once the underlying issue causing DTC P2173 on a BMW has been addressed and fixed, the fault codes can be cleared using a diagnostic scanner. This will reset the Check Engine Light and allow the vehicle’s computer system to monitor for any new issues.
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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