P0B1A

Hybrid/EV Battery Pack Voltage Sense C Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check engine light comes on
Hybrid system power reduction
Reducing electric range
Incorrect battery level display
The car may go into emergency mode

Causes

Open or short circuit in the voltage sensor circuit
Battery voltage sensor fault
Poor contact in circuit connectors
Problems with the battery management module
Contact corrosion in a high voltage system

How to Fix

Check the integrity of the wiring in the sensor circuit
Check connections and connector contacts
Test battery voltage sensor
Check the operation of the battery management module
If necessary, replace faulty components

Related codes

P0B1B P0B1C P0B1D