P0B70

Hybrid/EV Battery Voltage Sense K Circuit High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Reducing electric range
Incorrect battery level readings
The car goes into emergency mode

Causes

Battery voltage sensor fault
Damage to the wiring in the measurement circuit
Contact corrosion in a high voltage system
Problems with the battery management module
Malfunction of the highest voltage battery

How to Fix

Check the condition of the high-voltage battery
Inspect the voltage measurement circuit for damage
Check sensor contacts and connectors
Test voltage sensors
Diagnose the battery control module

Related codes

P0B71 P0B72 P0B73