BMW DTC P27E1 – Electric/Auxiliary Transmission Fluid Pump ‘A’ Pressure Too Low
DTC P27E1 meaning on BMW
The DTC P27E1 fault code on BMW vehicles indicates that the Electric/Auxiliary Transmission Fluid Pump ‘A’ is experiencing low pressure. This pump is responsible for maintaining proper fluid pressure within the transmission system.
BMW DTC P27E1 symptoms
Some common symptoms associated with the DTC P27E1 code on BMW vehicles may include:
- Transmission slipping
- Harsh shifting
- Transmission overheating
- Transmission warning light illuminated on the dashboard
BMW DTC P27E1 causes
The low pressure in the Electric/Auxiliary Transmission Fluid Pump ‘A’ that triggers the DTC P27E1 code on BMW vehicles can be caused by various factors, including:
- Malfunctioning transmission fluid pump
- Low transmission fluid level
- Blocked transmission fluid lines
- Internal transmission leaks
BMW DTC P27E1 seriousness
Ignoring the DTC P27E1 fault code on a BMW can lead to severe transmission issues and potential damage. Continued driving with low transmission fluid pressure can cause further damage to the transmission components and result in costly repairs.
How to diagnose DTC P27E1 on BMW
To diagnose the DTC P27E1 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the transmission fluid level and condition
- Check the operation of the Electric/Auxiliary Transmission Fluid Pump ‘A’
- Inspect for any leaks or blockages in the transmission fluid lines
How to fix DTC P27E1 on BMW
Fixing the DTC P27E1 code on a BMW involves addressing the root cause of the low transmission fluid pressure. Depending on the specific issue, potential solutions may include:
- Replacing the Electric/Auxiliary Transmission Fluid Pump ‘A’
- Topping up or replacing the transmission fluid
- Repairing any leaks in the transmission system
- Clearing any blockages in the transmission fluid lines
How to erase DTC P27E1 on BMW
Once the underlying issue causing the DTC P27E1 code on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. After the repair is completed, the mechanic can erase the code from the vehicle’s computer to reset the transmission system and ensure that the issue has been successfully addressed.
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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