P0AC8

Hybrid/EV Battery Temperature Sensor B Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hybrid system power reduction
Switching to emergency mode
Check Engine light comes on
Reduced battery efficiency
Incorrect battery temperature readings on the dashboard

Causes

Broken or damaged wires in the sensor circuit
Battery temperature sensor fault B
Poor contact in the sensor connector
Problems with the electronic control unit
Corrosion of contacts in the sensor circuit

How to Fix

Check the integrity of wires and connectors in the sensor circuit
Measure the resistance of the temperature sensor
Check contacts for corrosion
Replace battery temperature sensor B if necessary
Reset the error code and check if it returns

Related codes

P0AC6 P0AC7 P0AC9