P0B3C

Hybrid/EV Battery Voltage Sense A Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–167 (est.)

Symptoms

Hybrid system power reduction
Periodic switchover to internal combustion engine
The 'Check Hybrid System' indicator lights up
Unstable battery charge
Reduced fuel efficiency

Causes

Battery voltage measurement circuit malfunction
Damage or corrosion of sensor connectors
Open or short circuit in wiring harness
Voltage sensor module malfunction
Battery management module software error

How to Fix

Check the continuity of the voltage sensor circuit
Scan all hybrid system modules for related codes
Check the connections and connectors of the measuring circuit
Replace faulty sensor or wiring harness
Update Battery Management Module Software

Related codes

P0B3D P0B3B P0AFA