P0CB4

Hybrid/EV Battery Temperature Sensor O Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hybrid/electric system power reduction
Increased fuel consumption (for hybrids)
Warning messages on the dashboard
Incorrect operation of the charging system
Reduced overall system efficiency

Causes

Battery temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in sensor circuit connectors
Problems with the battery management module
Corroded or damaged wiring

How to Fix

Check the continuity of the temperature sensor circuit
Check sensor connectors and connections
Test battery temperature sensor
Replace temperature sensor if necessary
Check and update battery management module software

Related codes

P0CB5 P0CB3 P0A80