P0AB3

Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Low

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
The car goes into emergency mode
Unstable operation of the hybrid system
Extended charging time (for PHEV)

Causes

Temperature sensor B fault
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the battery management module

How to Fix

Check the continuity of the temperature sensor circuit
Inspect connectors and connections for corrosion or damage
Test temperature sensor B
Replace the faulty sensor if necessary
Check and update battery management module software
Repair only from an authorized dealer

Related codes

P0AB1 P0AB2 P0AB4