BMW DTC P145F – Secondary Air Pump Performance Too Low (Bank 2)
DTC P145F meaning on BMW
DTC P145F on a BMW indicates that the Secondary Air Pump performance is too low in Bank 2. The Secondary Air Pump is responsible for injecting fresh air into the exhaust system to help reduce emissions during cold starts. When the performance of the Secondary Air Pump is below the expected threshold, the DTC P145F is triggered.
BMW DTC P145F symptoms
Symptoms of DTC P145F on a BMW may include:
- Check Engine Light (MIL) illuminated
- Rough idle or engine misfires
- Reduced engine performance
- Increased emissions
BMW DTC P145F causes
Common causes of DTC P145F on a BMW include:
- Faulty Secondary Air Pump
- Blocked or restricted air passages
- Electrical issues in the Secondary Air Pump circuit
- Malfunctioning vacuum lines
BMW DTC P145F seriousness
While DTC P145F may not cause immediate drivability issues, it can lead to increased emissions and potential long-term damage to the vehicle’s emissions control system. It is important to address this issue promptly to ensure optimal engine performance and compliance with emissions regulations.
How to diagnose DTC P145F on BMW
To diagnose DTC P145F on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the Secondary Air Pump for proper operation
- Check for any blockages in the air passages
- Inspect the electrical connections and wiring related to the Secondary Air Pump
- Perform a smoke test to check for vacuum leaks
How to fix DTC P145F on BMW
To fix DTC P145F on a BMW, the following steps may be taken:
- Replace the faulty Secondary Air Pump
- Clean or clear any blockages in the air passages
- Repair or replace any damaged electrical components in the Secondary Air Pump circuit
- Replace malfunctioning vacuum lines
- Clear the fault code and reset the Check Engine Light
How to erase DTC P145F on BMW
To erase DTC P145F on a BMW, a diagnostic scanner can be used to clear the fault code from the vehicle’s ECU. Once the issue has been addressed and fixed, the fault code can be cleared, and the Check Engine Light reset to ensure that the repair was successful.
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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