P0B4D

Hybrid/EV Battery Voltage Sense D Circuit High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Check engine light comes on
Reduced performance of the hybrid system
Incorrect battery level readings
The car goes into emergency mode
Reduced engine power

Causes

Hybrid battery voltage sensor malfunction
Open or short circuit in wiring
Corrosion of contacts or connectors
Malfunction of the hybrid system control module
Problems with the hybrid battery itself

How to Fix

Check the integrity of the wiring and contacts of the sensor circuit
Test the hybrid battery voltage sensor
Check the voltage at the control module connectors
If necessary, replace the sensor or repair the wiring
Check the condition of the hybrid battery

Related codes

P0B4E P0B4F P0B50