P0CD9

Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine Light Is On
Hybrid system power reduction
Error message on the dashboard
Unstable operation of the battery cooling system
Increased noise from cooling fans

Causes

Battery Coolant Temperature Sensor Malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring Harness Problems
Malfunction of the hybrid system control unit

How to Fix

Check Battery Coolant Temperature Sensor B
Check the integrity of the sensor circuit
Inspect the connectors and contacts of the sensor
Check wiring harness for damage
Repair only from an authorized dealer

Related codes

P0CDA P0CD8 P0A80