BMW DTC P2748 – Intermediate Shaft Speed Sensor ‘B’ Circuit Intermittent
DTC P2748 meaning on BMW
DTC P2748 refers to an Intermediate Shaft Speed Sensor ‘B’ Circuit Intermittent issue in a BMW vehicle. This diagnostic trouble code indicates that there is a problem with the electrical circuit related to the intermediate shaft speed sensor ‘B’. The sensor is responsible for monitoring the speed of the intermediate shaft in the transmission.
BMW DTC P2748 symptoms
Symptoms of DTC P2748 in a BMW may include erratic shifting behavior, transmission slipping, hesitation during acceleration, and in some cases, the transmission may go into a limp mode. The Check Engine Light may also illuminate on the dashboard.
BMW DTC P2748 causes
The causes of DTC P2748 on a BMW can vary and may include a faulty intermediate shaft speed sensor ‘B’, damaged wiring or connectors in the sensor circuit, or issues with the transmission control module.
BMW DTC P2748 seriousness
While DTC P2748 may not always result in immediate drivability issues, it is important to address this problem promptly to prevent potential transmission damage or further complications. Ignoring this fault could lead to more severe transmission issues over time.
How to diagnose DTC P2748 on BMW
To diagnose DTC P2748 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and perform a visual inspection of the intermediate shaft speed sensor ‘B’ and its wiring. They may also conduct tests to check the sensor’s functionality and the integrity of the circuit.
Additional diagnostic steps may involve checking the transmission control module for any related faults and ensuring proper communication between the sensor and the module.
How to fix DTC P2748 on BMW
Fixing DTC P2748 on a BMW usually involves replacing the faulty intermediate shaft speed sensor ‘B’ if it is determined to be the root cause of the issue. The mechanic may also repair or replace any damaged wiring or connectors in the sensor circuit.
After the repairs are completed, the fault code should be cleared, and the vehicle should be test-driven to ensure that the issue has been resolved.
How to erase DTC P2748 on BMW
To erase DTC P2748 on a BMW, the fault code can be cleared using a diagnostic scanner or code reader. Once the repairs have been made and the issue resolved, the code can be cleared to reset the Check Engine Light and ensure that the fault does not reoccur.
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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