BMW DTC P1428 – Swirl Flap Output Stage Over Temperature
DTC P1428 meaning on BMW
DTC P1428 on a BMW indicates a fault with the swirl flap output stage over temperature. The swirl flap system is designed to control the airflow in the intake manifold, improving engine performance and efficiency. When the output stage of the swirl flap system exceeds the specified temperature range, the DTC P1428 is triggered.
BMW DTC P1428 symptoms
Symptoms of DTC P1428 on a BMW may include reduced engine performance, rough idling, engine misfires, and potentially an illuminated check engine light on the dashboard. In severe cases, the vehicle may go into limp mode to prevent further damage.
BMW DTC P1428 causes
The most common causes of DTC P1428 on a BMW are a faulty swirl flap actuator, a malfunctioning swirl flap motor, or wiring issues in the swirl flap system. Additionally, a clogged intake manifold or a faulty engine coolant temperature sensor can also contribute to this fault code.
BMW DTC P1428 seriousness
While DTC P1428 may not cause immediate drivability issues, it is important to address this fault promptly to prevent potential damage to the engine or other components. Ignoring this fault code can lead to reduced engine performance and increased fuel consumption.
How to diagnose DTC P1428 on BMW
To diagnose DTC P1428 on a BMW, a diagnostic scan tool capable of reading BMW-specific fault codes is required. The technician will need to inspect the swirl flap system components, including the actuator, motor, and wiring connections. Additionally, checking the intake manifold for any obstructions and testing the engine coolant temperature sensor may be necessary.
How to fix DTC P1428 on BMW
Fixing DTC P1428 on a BMW typically involves replacing the faulty swirl flap actuator or motor, repairing any damaged wiring, and clearing the fault code from the vehicle’s ECU. It is recommended to use genuine BMW parts for the replacement to ensure proper functionality of the swirl flap system.
How to erase DTC P1428 on BMW
To erase DTC P1428 on a BMW, a diagnostic scan tool capable of clearing fault codes is needed. The technician can access the vehicle’s ECU, locate the stored fault code, and clear it from the system. Once the fault code is erased, the check engine light should turn off if there are no other underlying 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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.