P0B91

Hybrid/EV Battery Voltage Sense R Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–111 (est.)

Symptoms

Check Engine light comes on
Reduced power or performance
System transition to emergency mode
Unusual behavior of the hybrid system
Reduced electric range

Causes

Battery voltage sensor fault
Damaged or corroded wiring
Poor contact in connectors
Problems with the battery management module
Malfunction of the battery itself

How to Fix

Check the condition of the wiring and connectors
Test voltage sensors
Check battery parameters
Scan Battery Management Module for Additional Codes
Replace faulty components

Related codes

P0B92 P0B90 P0B93