BMW DTC P1743 – Pressure Control Solenoid ‘E’ Electrical (M44/M52: Brake Band Electrical)
DTC P1743 meaning on BMW
The DTC P1743 for BMW refers to the Pressure Control Solenoid ‘E’ Electrical fault, specifically related to the brake band electrical system in the M44/M52 transmission. This fault code indicates an issue with the electrical circuitry of the pressure control solenoid ‘E’, which is responsible for regulating hydraulic pressure within the transmission.
BMW DTC P1743 symptoms
Symptoms of the DTC P1743 in a BMW may include harsh shifting, delayed engagement when shifting gears, transmission slipping, or the transmission going into limp mode. Additionally, the vehicle’s transmission may exhibit erratic behavior or fail to shift properly.
BMW DTC P1743 causes
The common causes of the DTC P1743 in a BMW include a faulty pressure control solenoid ‘E’, damaged wiring or connectors in the transmission circuit, low transmission fluid level, or a malfunctioning transmission control module (TCM).
BMW DTC P1743 seriousness
The DTC P1743 is a serious fault code as it directly affects the operation of the transmission. Ignoring this fault can lead to further damage to the transmission components and potentially result in costly repairs if not addressed promptly.
How to diagnose DTC P1743 on BMW
To diagnose the DTC P1743 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the transmission system. This may involve checking the wiring and connectors associated with the pressure control solenoid ‘E’, testing the solenoid itself for proper operation, and ensuring the transmission fluid level is adequate.
How to fix DTC P1743 on BMW
Fixing the DTC P1743 on a BMW usually involves replacing the faulty pressure control solenoid ‘E’, repairing any damaged wiring or connectors, topping up the transmission fluid to the correct level, and resetting the transmission control module. In some cases, a software update for the TCM may be required to address the fault code.
How to erase DTC P1743 on BMW
To erase the DTC P1743 on a BMW, a mechanic can use a diagnostic scanner to clear the fault code from the vehicle’s memory. Once the repair has been completed and the underlying issue resolved, the fault code can be erased to reset the transmission system and ensure proper operation.
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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