P0B86

Hybrid/EV Battery Voltage Sense P Circuit

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced vehicle power
Switching to emergency mode
Hybrid system error message on dashboard
Unstable operation of the hybrid system

Causes

Open or short circuit in the voltage sensor circuit
Battery voltage sensor fault
Connector problems or contact corrosion
Malfunction of the hybrid system control unit (HV ECU)
Damage to the high voltage system wiring harness

How to Fix

Check the continuity of the voltage sensor circuit
Inspect connectors and contacts for damage or corrosion
Check the functionality of the voltage sensor
Scan HV ECU memory for additional errors
Check the condition of the high voltage wiring harness

Related codes

P0B85 P0B87 P0AFA