BMW DTC P2172 – Throttle Actuator Control System – Sudden High Air Flow Detected
DTC P2172 meaning on BMW
DTC P2172 indicates that the Engine Control Module (ECM) has detected a sudden high airflow condition in the throttle actuator control system of a BMW vehicle. This means that the ECM has detected an unexpected increase in the amount of air entering the engine through the throttle body.
BMW DTC P2172 symptoms
Symptoms of DTC P2172 on a BMW may include:
- Check Engine Light illuminated
- Reduced engine power
- Engine stalling or hesitation
- Rough idling
- Decreased fuel efficiency
BMW DTC P2172 causes
The possible causes of DTC P2172 on a BMW include:
- Faulty throttle actuator
- Dirty or clogged throttle body
- Vacuum leaks in the intake system
- Wiring or connector issues in the throttle actuator control circuit
BMW DTC P2172 seriousness
DTC P2172 should be addressed promptly as it can lead to drivability issues and potential engine damage if left unresolved. Ignoring this fault may result in poor engine performance and increased fuel consumption.
How to diagnose DTC P2172 on BMW
To diagnose DTC P2172 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scan tool to retrieve the fault code and freeze frame data
- Inspect the throttle actuator and related components for any visible damage or wear
- Check for vacuum leaks in the intake system
- Test the throttle position sensor for proper operation
How to fix DTC P2172 on BMW
To fix DTC P2172 on a BMW, the following steps may be taken:
- Clean or replace the throttle body if it is dirty or clogged
- Repair any vacuum leaks in the intake system
- Inspect and repair any damaged wiring or connectors in the throttle actuator control circuit
- Replace the throttle actuator if it is found to be faulty
How to erase DTC P2172 on BMW
After fixing the underlying issue causing DTC P2172 on a BMW, the fault code can be erased using a diagnostic scan tool. This will clear the code from the ECM’s memory and turn off the Check Engine Light.
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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