BMW DTC P1894 – Supply Voltage Pressure Control Solenoid/Shift Solenoid Circuit Low
DTC P1894 meaning on BMW
DTC P1894 on a BMW indicates a fault in the Supply Voltage Pressure Control Solenoid/Shift Solenoid Circuit, specifically a low voltage condition. This fault code is related to the transmission control system and can affect the operation of the solenoids responsible for controlling hydraulic pressure within the transmission.
BMW DTC P1894 symptoms
Symptoms of DTC P1894 on a BMW may include harsh shifting, delayed shifting, transmission slipping, or the transmission going into limp mode. The vehicle may also exhibit poor acceleration and decreased fuel efficiency.
BMW DTC P1894 causes
The common causes of DTC P1894 on a BMW include a faulty pressure control solenoid, a short or open circuit in the wiring harness, a corroded connector, or a problem with the transmission control module.
BMW DTC P1894 seriousness
DTC P1894 should be addressed promptly as it can lead to further damage to the transmission if left unresolved. Ignoring this fault code may result in more severe transmission issues and potentially costly repairs.
How to diagnose DTC P1894 on BMW
To diagnose DTC P1894 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 transmission wiring harness and connectors. They may also conduct tests on the pressure control solenoid and check for any related faults in the transmission control module.
How to fix DTC P1894 on BMW
Fixing DTC P1894 on a BMW may involve replacing the faulty pressure control solenoid, repairing any damaged wiring or connectors, or reprogramming the transmission control module. It is recommended to follow the manufacturer’s diagnostic and repair procedures to ensure a proper fix.
How to erase DTC P1894 on BMW
Once the underlying issue causing DTC P1894 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the transmission control module and turn off the check engine light. It is important to verify that the issue has been fixed 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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