P0B8E

Hybrid/EV Battery Voltage Sense Q Circuit High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$278–1667 (est.)

Symptoms

Reduced power or efficiency of the hybrid system
Check Engine Warning Light or Battery Problems
Limitation of operation in electric mode
Unstable charging of high voltage battery
The car may go into emergency mode

Causes

Faulty battery section Q voltage sensor
Damage to wiring or contacts in the measuring circuit
Problems with balancing high-voltage battery cells
Battery management module (BMS) malfunction
Damage to the insulation of high voltage components

How to Fix

Diagnosis of fault codes and battery parameters via scanner
Checking the integrity of voltage measurement circuits
High Voltage System Insulation Resistance Testing
Checking the condition and balancing of battery cells
Checking connection contacts and circuit grounding
Replacing faulty high voltage system components

Related codes

P0B8F P0B90 P0AFA