OBD Guide
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P1BA4

Hybrid/Electric Vehicle Battery 64 Circuit High Voltage

P1BA4 is an OBD-II diagnostic trouble code meaning: Hybrid/Electric Vehicle Battery 64 Circuit High Voltage. Common causes: high voltage battery fault, problems with the charging system. Estimated repair cost: $167–2778.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–2778 (est.)

Symptoms

  • The vehicle goes into emergency mode
  • Reduced power or complete loss of traction
  • Warning lights on the dashboard come on
  • Inability to charge high voltage battery
  • Disabling the hybrid system

Causes

  • High voltage battery fault
  • Problems with the charging system
  • Damage to high voltage wiring
  • Battery Management Module (BMS) malfunction
  • Short circuit in high voltage circuit

How to Fix

  1. Diagnosis of high-voltage battery condition
  2. Checking the integrity of high-voltage wiring
  3. Charging system testing
  4. Checking the operation of the battery management unit (BMS)
  5. Repair or replacement of faulty components
  6. Repair only from an authorized dealer

Related codes

P1BA5P1BA3P0AA1

FAQ

What does the P1BA4 code mean?

P1BA4 is an OBD-II diagnostic trouble code that indicates: Hybrid/Electric Vehicle Battery 64 Circuit High Voltage

What causes a P1BA4 error code?

The most common causes of P1BA4 include: High voltage battery fault; Problems with the charging system; Damage to high voltage wiring; Battery Management Module (BMS) malfunction.

How do I fix a P1BA4 diagnostic trouble code?

To fix P1BA4: Diagnosis of high-voltage battery condition. Checking the integrity of high-voltage wiring. Charging system testing. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1BA4?

Do not drive — repair immediately

How much does it cost to fix P1BA4?

The estimated repair cost for P1BA4 is $167–2778. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat