P0ACA

Hybrid/EV Battery Temperature Sensor C Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Increased fuel consumption (for hybrids)
Error message on display
Activation of emergency operation

Causes

Temperature sensor fault C
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Battery management module (BMS) malfunction

How to Fix

Check the resistance of the temperature sensor
Inspect the sensor circuit for breaks and short circuits
Check the quality of connections in the connectors
Replace faulty temperature sensor
Update or replace the BMS module if necessary

Related codes

P0AC8 P0AC9 P0ACB