Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
To diagnose the P1EF3 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The battery charger uses a liquid cooled cooling system which is cooled from the front of the vehicle. The hybrid electronic cooling system needs to be functioning properly for the battery charger to be able to meet its temperature requirements.
The hybrid/EV powertrain control module 2 monitors the battery charger temperature and verifies it is within its proper operating range. There is a temperature sensor that measures the overall temperature of the battery charger. Also, there are battery charger internal temperatures sensors that monitor for over-temperature conditions, that are for the voltage converter 1, voltage converter 2 and the voltage conditioner within the battery charger.
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