BMW DTC P1844 – Pressure Control Solenoid ‘D’ Circuit Low
DTC P1844 meaning on BMW
DTC P1844 on a BMW indicates an issue with the Pressure Control Solenoid ‘D’ circuit being detected as low. This fault code is specific to the transmission system and points towards a problem with the solenoid responsible for controlling hydraulic pressure within the transmission.
BMW DTC P1844 symptoms
Symptoms of DTC P1844 on a BMW may include harsh shifting, delayed engagement when shifting gears, transmission slipping, or the transmission going into limp mode. The Check Engine Light may also be illuminated on the dashboard.
BMW DTC P1844 causes
The common causes of DTC P1844 on a BMW include a faulty Pressure Control Solenoid ‘D’, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or internal transmission issues.
BMW DTC P1844 seriousness
Ignoring DTC P1844 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 P1844 on BMW
To diagnose DTC P1844 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the Pressure Control Solenoid ‘D’ and its wiring. They may also conduct tests to check the solenoid’s resistance and functionality, as well as inspect the transmission fluid level and condition.
How to fix DTC P1844 on BMW
Fixing DTC P1844 on a BMW may involve replacing the Pressure Control Solenoid ‘D’ if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the circuit, ensuring the transmission fluid level is correct, and addressing any internal transmission issues may be necessary to resolve the problem.
How to erase DTC P1844 on BMW
Once the underlying issue causing DTC P1844 on a BMW has been fixed, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s memory and turn off the Check Engine Light. 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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