BMW DTC P1AAE – Electric/Auxiliary Transmission Fluid Pump Underspeed
DTC P1AAE meaning on BMW
The DTC P1AAE code on BMW vehicles refers to an Electric/Auxiliary Transmission Fluid Pump Underspeed fault. This fault code indicates that the electric or auxiliary transmission fluid pump is not operating at the expected speed, which can lead to issues with the transmission system.
BMW DTC P1AAE symptoms
Symptoms of the DTC P1AAE code on a BMW may include:
- Transmission slipping
- Harsh shifting
- Transmission overheating
- Reduced fuel efficiency
BMW DTC P1AAE causes
Common causes of the DTC P1AAE code on BMW vehicles include:
- Malfunctioning electric or auxiliary transmission fluid pump
- Low transmission fluid level
- Wiring or connector issues
- Faulty transmission control module
BMW DTC P1AAE seriousness
The DTC P1AAE code should be addressed promptly as it can lead to further damage to the transmission system if left unresolved. Ignoring this fault may result in transmission failure and potentially costly repairs.
How to diagnose DTC P1AAE on BMW
To diagnose the DTC P1AAE code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer
- Inspect the electric or auxiliary transmission fluid pump for proper operation
- Check the transmission fluid level and condition
- Inspect the wiring and connectors related to the transmission system
How to fix DTC P1AAE on BMW
To fix the DTC P1AAE code on a BMW, the following steps may be taken:
- Replace the electric or auxiliary transmission fluid pump if faulty
- Top up or replace the transmission fluid as needed
- Repair any damaged wiring or connectors in the transmission system
- If necessary, replace the transmission control module
How to erase DTC P1AAE on BMW
After the underlying issue causing the DTC P1AAE code has been resolved, the fault code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s computer memory and turn off the check engine light.
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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