P0B8A

Hybrid/EV Battery Voltage Sense P Circuit Intermittent/Erratic

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced hybrid system efficiency
The car may go into emergency mode
Unstable operation of the power plant
Low battery power

Causes

Hybrid battery voltage sensor malfunction
Damage or corrosion of wires in the sensor circuit
Poor contact in sensor circuit connectors
Problems with the hybrid system control unit
Damage to wire insulation near high voltage components

How to Fix

Check the continuity and resistance of the voltage sensor circuit
Inspect connectors and contacts for corrosion or damage
Check the functionality of the voltage sensor
Scan the control unit for additional errors
If necessary, replace the voltage sensor or repair the wiring

Related codes

P0B89 P0B8B P0B8C