What does code P0BC9 mean?

Q: What does code P0BC9 mean?

Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Low. P0BC9 means the hybrid or electric vehicle battery pack cooling fan 1 control circuit is reporting a voltage lower than expected, so the battery energy control module has detected a short to ground or an open circuit on the fan's sense line. The module uses this sense circuit to confirm the cooling fan is receiving the commanded current, and a low signal tells it the fan may not be spinning fast enough to keep the high-voltage battery within its safe temperature range.

DTC codes / P0Bxx · Hybrid propulsion / P0BC9

P0BC9Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Low

P0BC9 means the hybrid or electric vehicle battery pack cooling fan 1 control circuit is reporting a voltage lower than expected, so the battery energy control module has detected a short to ground or an open circuit on the fan's sense line. The module uses this sense circuit to confirm the cooling fan is receiving the commanded current, and a low signal tells it the fan may not be spinning fast enough to keep the high-voltage battery within its safe temperature range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.