BMW DTC P1845 – Pressure Control Solenoid ‘E’ Circuit Low
DTC P1845 meaning on BMW
DTC P1845 on a BMW indicates an issue with the Pressure Control Solenoid ‘E’ 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 P1845 symptoms
Symptoms of DTC P1845 on a BMW may include harsh shifting, delayed shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a failsafe mode to prevent further damage.
BMW DTC P1845 causes
The common causes of DTC P1845 on a BMW include a faulty pressure control solenoid ‘E’, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or internal transmission issues.
BMW DTC P1845 seriousness
DTC P1845 should be taken seriously as it can lead to further transmission damage if left unresolved. Driving with this fault code present can cause additional stress on the transmission components and may result in costly repairs if not addressed promptly.
How to diagnose DTC P1845 on BMW
To diagnose DTC P1845 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 ‘E’ and its wiring. Testing the solenoid’s resistance and checking for proper voltage supply are common diagnostic steps to pinpoint the issue.
How to fix DTC P1845 on BMW
Fixing DTC P1845 on a BMW usually involves replacing the faulty pressure control solenoid ‘E’ and addressing any damaged wiring or connectors in the circuit. Additionally, ensuring the transmission fluid level is correct and performing a transmission fluid flush and filter replacement may be necessary.
How to erase DTC P1845 on BMW
Once the underlying issue causing DTC P1845 on a BMW has been fixed, the fault code can be erased using a diagnostic scanner. By clearing the code, the vehicle’s onboard computer will reset the transmission system’s parameters and monitor for any recurring issues.
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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