P0BCB

Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–133 (est.)

Symptoms

The Check Engine Light or Hybrid System Warning comes on
Reduced battery cooling efficiency
Possible vehicle power limitation
Noise from the battery cooling fan
Intermittent fan operation

Causes

Damage to the sensor circuit wiring harness
Poor contact in fan or sensor connectors
Fan speed sensor malfunction
Problems with the cooling fan itself
Defective hybrid system control module

How to Fix

Check the condition of the wiring harness and connectors in the fan circuit
Clean the contacts and check the connections
Test the fan speed sensor
Check the operation of the fan itself
If necessary, replace faulty components

Related codes

P0BCA P0BCC P0BCD