P0B74

Hybrid/EV Battery Voltage Sense L Circuit Low

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
The car goes into emergency mode
Reducing electric range
Unstable operation of the hybrid system

Causes

Open or short circuit in voltage sensor circuit L
Battery voltage sensor malfunction
Connector problems or contact corrosion
Malfunction of the hybrid system control module
Battery problems (low charge, damaged cells)

How to Fix

Check the continuity of the voltage sensor L circuit
Inspect and clean connector contacts
Check the functionality of the voltage sensor
Test the battery
If necessary, replace the sensor or repair the circuit

Related codes

P0B75 P0B76 P0A80