P0C85

Hybrid/EV Battery Temperature Sensor H Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–89 (est.)

Symptoms

Hybrid/electric system power reduction
Battery warning on dashboard
Extended charging time (for PHEV/EV)
System transition to emergency mode
Unstable battery temperature readings

Causes

Faulty battery temperature sensor H
Damaged or corroded electrical connections
Open or short circuit in wiring harness
Problems with sensor connectors
Battery management module (BMS) malfunction

How to Fix

Check the condition of the sensor connectors and connections
Test the resistance and voltage of the temperature sensor
Check the integrity of the sensor wiring harness
Replace the faulty temperature sensor if necessary
Scan the battery control module for additional trouble codes

Related codes

P0C84 P0C86 P0A80