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DTC codes / P0Cxx · Hybrid propulsion / P0CD8
P0CD8 indicates that the hybrid or electric vehicle battery pack coolant temperature sensor B circuit is reporting a voltage higher than the manufacturer's expected range. The battery energy control module monitors this sensor to protect the high-voltage battery from overheating or overcooling, and it sets the code when the signal voltage stays above the calibrated threshold for a set time.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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