P0B4A

Symptoms

• Check Engine light comes on
• Hybrid system power reduction
• Reducing electric range
• Incorrect display of battery charge level
• The car may go into emergency mode

Causes

• Open or short circuit in the sensor circuit
• Voltage sensor fault
• Problems with the Battery Management Module (BMS)
• Contact corrosion in a high voltage system
• Damage to the insulation of high-voltage wires

How to Fix

1. Check the continuity of the voltage sensor circuit
2. Test the voltage sensor to ensure it meets specifications
3. Check connections and contacts in the high voltage system
4. Scan the Battery Management Module for additional errors
5. If necessary, replace the voltage sensor or repair the circuit
6. Repair only from an authorized dealer

Related codes

Error P0B4A by Vehicle Brand