P0B49

Hybrid/EV Battery Voltage Sense C 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
Hybrid system power reduction
Unstable operation of the power plant
Errors in battery level readings
Increased fuel consumption (for hybrids)

Causes

Damage to the measuring circuit wiring harness
Oxidation or corrosion of contacts
Faulty battery voltage sensors
Problems with the battery management module
Mechanical damage to components

How to Fix

Check the integrity of the wiring harness
Clean and check all contacts in the circuit
Test voltage sensors
Check the operation of the battery management module
Replace damaged components

Related codes

P0B4A P0B4B P0B4C