P0B12

Hybrid/EV Battery Pack Current Sensor B Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–133 (est.)

Symptoms

Check Engine light comes on
Reduced hybrid system efficiency
Incorrect battery level display
Reduced power or jerky acceleration
The vehicle goes into emergency mode

Causes

Hybrid battery current sensor malfunction
Open or short circuit in the sensor circuit
Oxidized or damaged connector pins
Circuit Grounding Problems
Control module software error

How to Fix

Check the integrity of the sensor wiring and connectors
Test the current sensor with a multimeter
Clean connector contacts from oxides
Check and, if necessary, update the control module software
Replace faulty current sensor

Related codes

P0B11 P0B13 P0B14