BMW DTC P1A49 – Hybrid/EV Battery Pack Evaluation Electronics Failure Single Cell Voltage
DTC P1A49 meaning on BMW
The DTC P1A49 on a BMW indicates a Hybrid/EV Battery Pack Evaluation Electronics Failure related to Single Cell Voltage. This fault code is specific to the evaluation electronics of the hybrid or electric vehicle battery pack and points to an issue with the voltage of a single cell within the battery pack.
BMW DTC P1A49 symptoms
Symptoms of the DTC P1A49 on a BMW may include:
- Reduced hybrid or electric vehicle performance
- Check Engine Light (CEL) or hybrid system warning light illuminated on the dashboard
- Decreased fuel efficiency
- Vehicle may go into a reduced power mode
BMW DTC P1A49 causes
Common causes of the DTC P1A49 on a BMW include:
- Single cell voltage imbalance within the hybrid or electric vehicle battery pack
- Issues with the evaluation electronics monitoring the battery pack
- Faulty battery cell or battery management system
BMW DTC P1A49 seriousness
The DTC P1A49 is a serious fault code on a BMW as it relates to the evaluation electronics of the hybrid or electric vehicle battery pack. Ignoring this fault can lead to further damage to the battery pack and potentially affect the vehicle’s performance and safety.
How to diagnose DTC P1A49 on BMW
To diagnose the DTC P1A49 on a BMW, a comprehensive scan tool capable of reading hybrid or electric vehicle system codes is required. The diagnostic process may involve:
- Checking the voltage levels of individual cells within the battery pack
- Inspecting the evaluation electronics for any faults or malfunctions
- Performing a battery system test to identify any issues with the battery pack
How to fix DTC P1A49 on BMW
Fixing the DTC P1A49 on a BMW may involve the following steps:
- Addressing any single cell voltage imbalances within the battery pack
- Repairing or replacing faulty evaluation electronics components
- Resetting the battery management system to recalibrate the battery pack
- Performing a battery pack reconditioning procedure if necessary
How to erase DTC P1A49 on BMW
To erase the DTC P1A49 on a BMW, the fault code can be cleared using a compatible diagnostic scan tool. After fixing the underlying issue causing the fault code, the code can be cleared to reset the system and turn off the warning lights on the dashboard.
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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