P1B4A
Hybrid/Electric Vehicle Battery 34 Circuit High Voltage
P1B4A is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 34 Circuit High Voltage. Common causes: high voltage battery fault, problems with the battery management system (bms). Estimated repair cost: $167–889.
Symptoms
- Check Engine light comes on
- Reduced power or hybrid system failure
- Warning message on dashboard
- The car goes into emergency mode
- Unusual sounds from the battery compartment
Causes
- High voltage battery fault
- Problems with the Battery Management System (BMS)
- Damage to the insulation of high-voltage wires
- Short circuit in circuit 34
- Faulty battery contactors
How to Fix
- Carry out diagnostics of the high-voltage system
- Check the condition of the battery and its elements
- Inspect the integrity of the insulation of high-voltage circuits
- Check the operation of the battery management system (BMS)
- Repair only from an authorized dealer
Related codes
FAQ
What does the P1B4A code mean?
P1B4A is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 34 Circuit High Voltage
What causes a P1B4A error code?
The most common causes of P1B4A include: High voltage battery fault; Problems with the Battery Management System (BMS); Damage to the insulation of high-voltage wires; Short circuit in circuit 34.
How do I fix a P1B4A diagnostic trouble code?
To fix P1B4A: Carry out diagnostics of the high-voltage system. Check the condition of the battery and its elements. Inspect the integrity of the insulation of high-voltage circuits. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1B4A?
Do not drive — repair immediately
How much does it cost to fix P1B4A?
The estimated repair cost for P1B4A is $167–889. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat