BMW DTC P028D – Charge Air Cooler Cooling Fan Control Circuit Low
DTC P028D meaning on BMW
The DTC P028D on a BMW indicates a fault in the charge air cooler cooling fan control circuit. This fault is triggered when the powertrain control module (PCM) detects that the signal voltage from the charge air cooler cooling fan is lower than the specified threshold.
BMW DTC P028D symptoms
Symptoms of the DTC P028D in a BMW may include reduced engine performance, decreased fuel efficiency, and the illumination of the check engine light on the dashboard.
BMW DTC P028D causes
Common causes of the DTC P028D in a BMW include a faulty charge air cooler cooling fan, damaged wiring or connectors in the cooling fan circuit, or a malfunctioning PCM.
BMW DTC P028D seriousness
While the DTC P028D may not cause immediate drivability issues, it can lead to reduced engine efficiency and potential long-term damage if left unresolved. It is recommended to address this issue promptly.
How to diagnose DTC P028D on BMW
To diagnose the DTC P028D on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the PCM. They would then inspect the charge air cooler cooling fan, wiring, and connectors for any visible damage or loose connections.
How to fix DTC P028D on BMW
Fixing the DTC P028D on a BMW may involve replacing the charge air cooler cooling fan if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the cooling fan circuit and resetting the fault codes in the PCM can help resolve the issue.
How to erase DTC P028D on BMW
To erase the DTC P028D on a BMW, a mechanic would typically use a diagnostic scanner to clear the fault codes stored in the PCM. Once the issue has been addressed and fixed, the fault codes can be reset to 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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