BMW DTC P1A68 – Hybrid/EV Battery Overtemperature Detected by Temperature Sensor ‘H’
DTC P1A68 meaning on BMW
The Diagnostic Trouble Code (DTC) P1A68 on a BMW indicates that the hybrid or electric vehicle (EV) battery has been detected as overtemperature by the temperature sensor ‘H’. This means that the battery’s temperature has exceeded the safe operating range as monitored by the sensor.
BMW DTC P1A68 symptoms
Symptoms of the DTC P1A68 on a BMW may include warning lights on the dashboard related to the hybrid or EV system, reduced performance or efficiency of the vehicle, and in some cases, the vehicle may go into a reduced power mode to prevent further damage.
BMW DTC P1A68 causes
The overtemperature condition detected by the temperature sensor ‘H’ can be caused by various factors such as high ambient temperatures, prolonged heavy use of the hybrid or EV system, a malfunctioning cooling system for the battery, or issues with the temperature sensor itself.
BMW DTC P1A68 seriousness
The DTC P1A68 is a serious issue that should be addressed promptly to prevent potential damage to the hybrid or EV battery. Operating the vehicle with an overtemperature battery can lead to reduced battery life, performance issues, and in extreme cases, safety hazards.
How to diagnose DTC P1A68 on BMW
To diagnose the DTC P1A68 on a BMW, a diagnostic scan tool capable of reading hybrid/EV system codes will be needed. The technician will need to check the temperature sensor ‘H’ readings, inspect the battery cooling system, and perform tests to determine the cause of the overtemperature condition.
How to fix DTC P1A68 on BMW
Fixing the DTC P1A68 on a BMW may involve addressing the root cause of the overtemperature condition. This can include repairing or replacing the faulty temperature sensor ‘H’, ensuring proper cooling system operation, and addressing any other issues contributing to the high battery temperature.
How to erase DTC P1A68 on BMW
Once the underlying issue causing the DTC P1A68 has been resolved, the code can be cleared using a diagnostic scan tool. After the repair is completed, the technician can erase the code, and if the issue has been successfully fixed, the warning lights related to the DTC should no longer appear 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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