P0BC7

Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Noisy cooling fan
Battery overheating
The car goes into emergency mode

Causes

Fan sensor circuit open
Fan speed sensor malfunction
Wiring harness damage
Poor contact in connectors
Battery management module malfunction

How to Fix

Check the integrity of the sensor circuit
Test the fan speed sensor
Inspect and repair damaged wiring
Clean and tighten connector pins
Check the operation of the battery management module

Related codes

P0BC8 P0BC6 P0AFA