BMW DTC P1903 – Pressure Control Solenoid ‘D’ Shift Progress Too Low
DTC P1903 meaning on BMW
DTC P1903 on a BMW indicates an issue with the Pressure Control Solenoid ‘D’ Shift Progress being too low. This fault code is related to the transmission system and specifically points to a problem with the solenoid that controls the pressure in the transmission.
BMW DTC P1903 symptoms
Symptoms of DTC P1903 on a BMW may include harsh shifting, delayed shifting, transmission slipping, poor acceleration, and in some cases, the transmission may go into limp mode. The Check Engine Light may also be illuminated on the dashboard.
BMW DTC P1903 causes
The common causes of DTC P1903 on a BMW include a faulty Pressure Control Solenoid ‘D’, low transmission fluid level, dirty or contaminated transmission fluid, wiring issues, or a malfunctioning transmission control module.
BMW DTC P1903 seriousness
Ignoring DTC P1903 on a BMW can lead to further damage to the transmission system, potentially resulting in costly repairs. It is important to address this issue promptly to prevent any long-term damage to the vehicle.
How to diagnose DTC P1903 on BMW
To diagnose DTC P1903 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes from the vehicle’s computer. They would then inspect the transmission fluid level and condition, check the wiring and connectors related to the Pressure Control Solenoid ‘D’, and perform a thorough visual inspection of the transmission components.
How to fix DTC P1903 on BMW
Fixing DTC P1903 on a BMW may involve replacing the Pressure Control Solenoid ‘D’, topping up or changing the transmission fluid, repairing any damaged wiring or connectors, or reprogramming the transmission control module. It is recommended to follow the manufacturer’s repair procedures and use genuine parts to ensure a proper fix.
How to erase DTC P1903 on BMW
Once the underlying issue causing DTC P1903 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and erase the stored fault code from the vehicle’s computer. It is important to ensure that the repair has been successful before clearing the fault code.
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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